use.local.desc

# This file is deprecated as per GLEP 56 in favor of metadata.xml. Please add
# your descriptions to your package's metadata.xml ONLY.
# * generated automatically using egencache *

app-admin/propellor:type-errors - Build with type-errors library for better error messages and less memory use
app-text/pandoc:embed-data-files - Embed data files in binary for relocatable executable.
app-text/pandoc:optimize - Enable -O1 optimizations (requires ~16GiB memory)
app-text/pandoc:trypandoc - Build trypandoc cgi executable.
dev-haskell/abstract-deque:usecas - Enable the reference implementation to use hardware compare-and-swap.
dev-haskell/accelerate:bounds-checks - Enable bounds checking.
dev-haskell/accelerate:ekg - Enable hooking mechanisp for monitoring via dev-haskell/ekg.
dev-haskell/accelerate:internal-checks - Enable internal consistency checks.
dev-haskell/accelerate:more-pp - Enable HTML and Graphviz pretty printing.
dev-haskell/accelerate:unsafe-checks - Enable bounds checking in unsafe operations.
dev-haskell/accelerate-cuda:bounds-checks - Enable bounds checking.
dev-haskell/accelerate-cuda:internal-checks - Enable internal consistency checks.
dev-haskell/accelerate-cuda:unsafe-checks - Enable bounds checking in unsafe operations.
dev-haskell/accelerate-fft:cuda - Enable support for using CUFFT via the CUDA backend's FFI.
dev-haskell/accelerate-io:bounds-checks - Enable bounds checking.
dev-haskell/accelerate-io:internal-checks - Enable internal consistency checks.
dev-haskell/accelerate-io:unsafe-checks - Enable bounds checking in unsafe operations.
dev-haskell/acid-state:skip-state-machine-test - If enabled, do not build/run the state-machine test
dev-haskell/aeson:cffi - Controls whether to include c-ffi bits or pure haskell. Default to False for security.
dev-haskell/aeson:fast - compile without optimizations
dev-haskell/aeson-pretty:lib-only - don't build 'aeson-pretty' executable.
dev-haskell/aeson-yaml:build-binaries - Build the binaries
dev-haskell/alsa-pcm:buildexamples - Build example executables
dev-haskell/alsa-seq:modifyfilter - Use native event filter functions that are provided by newer ALSA versions
dev-haskell/ansi-terminal:example - Build the example application.
dev-haskell/ansi-wl-pprint:example - Build the example application.
dev-haskell/atomic-primops:debug - Enable extra internal checks.
dev-haskell/attoparsec-iso8601:developer - operate in developer mode
dev-haskell/attoparsec-iso8601:fast - compile without optimizations
dev-haskell/authenticate:network-uri - Get Network.URI from the network-uri package
dev-haskell/aws:network-3 - Use network-3
dev-haskell/bench-show:executable - Build executable as well as library
dev-haskell/bifunctors:semigroups - Enable the use of `semigroups` package. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/bifunctors:tagged - Enable the use of the `tagged` package. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/bindings-glfw:exposenative - Whether or not to use the native access functions.
dev-haskell/bindings-glfw:osmesa - Determines whether or not to use the Mesa 3D rendering context.
dev-haskell/biosff:fclip - Build the 'fclip' executable.
dev-haskell/biosff:flower - Build the 'flower' executable.
dev-haskell/biosff:frecover - Build the 'frecover' executable.
dev-haskell/bits-atomic:test - Build test program.
dev-haskell/bitstring:withquickcheck - Build with QuickCheck test. Note that Show instances will be different.
dev-haskell/bound:template-haskell - Enable additional test modules requiring Template Haskell support.
dev-haskell/brick:demos - Build demonstration programs.
dev-haskell/broadcast-chan:sync - Benchmarks synchronisation primitives used in main benchmark.
dev-haskell/broadcast-chan:threaded - Run benchmarks with threaded backend.
dev-haskell/bson:old-network - Use network-2.x when enabled, else use network-bsd.
dev-haskell/btrfs:examples - Build examples
dev-haskell/bytedump:executable - build executable file
dev-haskell/bytes:test-doctests - Enable the doctest suite when using the enable-tests option for cabal.
dev-haskell/c2hs:regression - Enable regression suite build.
dev-haskell/cabal-install:debug-conflict-sets - Add additional information to ConflictSets
dev-haskell/cabal-install:native-dns - Enable use of the resolv and windns packages for performing DNS lookups
dev-haskell/cabal-plan:license-report - Enable @license-report@ sub-command (only relevant when the @exe@ flag is active)
dev-haskell/cabal-plan:underline - Enable underlining of primary unit-ids
dev-haskell/cabal-rpm:curl - Use curl library to query Stackage instead of http-client
dev-haskell/categories:optimize - enable optimizations
dev-haskell/cborg:optimize-gmp - Use optimized code paths for integer-gmp
dev-haskell/chaselev-deque:debug - Enable the extra internal checks.
dev-haskell/cheapskate:dingus - Build cheapskate-dingus cgi script
dev-haskell/chell:color-output - use colors in program output
dev-haskell/chimera:representable - Define Representable instance from adjunctions package
dev-haskell/citeproc:executable - Build citeproc executable
dev-haskell/citeproc:icu - Use Haskell bindings to the ICU library
dev-haskell/clash-ghc:dynamic - Build Clash binaries with GHC flag `-dynamic`. This flag should only be used for packaging purposes. Installations using cabal should use `--enable-executable-dynamic`!
dev-haskell/clash-ghc:ghc-paths - Locate the GHC core libraries using the `ghc-paths` package. Note: this flag may make binaries less relocatable, by hard-coding an absolute path to the core libraries.
dev-haskell/clash-lib:debug - Build a debug compiler
dev-haskell/clash-lib:history - Emit rewrite history to disk
dev-haskell/clash-lib:unittests - You can disable testing with unittests using `-f-unittests`
dev-haskell/clash-prelude:benchmarks - Enable testing with benchmarks
dev-haskell/clash-prelude:doctests - Enable testing with doctests
dev-haskell/clash-prelude:multiple-hidden - Allow multiple hidden clocks, resets, and enables to be used. This is an experimental feature, possibly triggering confusing error messages. By default, it is enabled on development versions of Clash and disabled on releases.
dev-haskell/clash-prelude:super-strict - Use `deepseqX` (instead of `seqX`) in register-like constructs. This can help to eliminate space leaks when using lazy data structures in registers-like constructs. This potentially slows down Clash hardware simulation.
dev-haskell/clash-prelude:unittests - You can disable testing with unittests using `-f-unittests`
dev-haskell/clckwrks:network-uri - Get Network.URI from the network-uri package
dev-haskell/cmark:system-cmark - use app-text/cmark instead of bundled copy
dev-haskell/cmdargs:quotation - Build quote module
dev-haskell/cmdargs:testprog - Build the test program
dev-haskell/comonad:indexed-traversable - You can disable the use of the `indexed-traversable` package using `-f-indexed-traversable`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `FunctorWithIndex`
dev-haskell/concurrent-supply:test-properties - 
dev-haskell/constraints-deriving:constraints - Use vanilla constraints package as a dependency instead of the manual minimalistic definitions copied from there.
dev-haskell/constraints-deriving:debug - Show debug trace info (used only for library development). Note, if you want to see the debug output of the plugin in another project, you may need to manually define a CPP option -DPLUGIN_DEBUG in that project.
dev-haskell/constraints-deriving:examples - Whether to build examples
dev-haskell/contravariant:semigroups - Enable the use of the `semigroups` package. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/contravariant:statevar - Enable the use of of the `statevar` package. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/contravariant:tagged - Enable the use of the `tagged` package. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/country-codes:generate - Build generate executable?
dev-haskell/cpu:executable - build 'cpuid' tool
dev-haskell/criterion:embed-data-files - Embed the data files in the binary for a relocatable executable. (Warning: This will increase the executable size significantly.)
dev-haskell/cron:lib-werror - 
dev-haskell/crypto-api:all-cpolys - Build all the CMAC polynomes up to 10000 bits instead of just the usual ones
dev-haskell/cryptonite:cpu-flags-x86-rdrand - allow compilation with RDRAND on system and architecture that supports it
dev-haskell/cryptonite:integer-gmp - Whether or not to use GMP for some functions
dev-haskell/data-lens:derivedatatypeable - Use the DeriveDataTypeable extension. This makes lens compile with old compilers. Users need not worry about it.
dev-haskell/data-lens-fd:derivedatatypeable - Use the DeriveDataTypeable extension. This makes lens compile with old compilers. Users need not worry about it.
dev-haskell/data-reify:tests - Enable full development tree
dev-haskell/dhall:cross - Disable TemplateHaskell to make cross-compiling easier
dev-haskell/dhall:http - Include support for importing dhall modules from HTTP URLs
dev-haskell/dhall:http-client-tls - Use http-client-tls for resolving HTTP imports by default (requires with-http to be enabled)
dev-haskell/diagrams:canvas - Enable canvas backend.
dev-haskell/diagrams:postscript - Enable the Haskell-native PostScript backend.
dev-haskell/diagrams:rasterific - Enable rasterific backend.
dev-haskell/diagrams-builder:pgf - install PGF-specific builder tool
dev-haskell/diagrams-builder:ps - Enable postscript backend
dev-haskell/diagrams-builder:rasterific - Enable rasterific backend
dev-haskell/dimensions:unsafe-indices - Disable bound checks on Idx and Idxs types
dev-haskell/direct-sqlite:fulltextsearch - Enable full-text search when using the bundled sqlite library.
dev-haskell/direct-sqlite:json1 - Enable json1 extension.
dev-haskell/direct-sqlite:systemlib - Use the system-wide sqlite library.
dev-haskell/direct-sqlite:urifilenames - Enable URI filenames when using the bundled sqlite library.
dev-haskell/dotenv:dev - Turn on development settings.
dev-haskell/dotenv:static - Creates static binary.
dev-haskell/encoding:systemencoding - Provide the getSystemEncoding action to query the locale.
dev-haskell/entropy:halvm - Build for the HaLVM.
dev-haskell/ether:disable-tup-instances - Disable auto-generated HasLens instances for tuples.
dev-haskell/extensible:barbies - "define instances for barbies"
dev-haskell/extensible:cassava - "define instances for cassava"
dev-haskell/extensible-effects:dump-core - Dump HTML for the core generated by GHC during compilation
dev-haskell/ffmpeg-light:builddemo - Build demo executable
dev-haskell/ffmpeg-light:buildrasterdemo - Build Rasterific demo executable
dev-haskell/ffmpeg-light:buildtranscodedemo - Build transcode demo executable
dev-haskell/ffmpeg-light:buildvplaydemo - Build video player demo executable
dev-haskell/filestore:maxcount - Make use of a recent (>= 2.3.0) Darcs feature which vastly improves the performance of 'latest'. You should disable this flag if you plan to use gitit with an older version of Darcs, or 'latest' will raise an error.
dev-haskell/finite-field:useghctypelits - GHC.TypeLits module
dev-haskell/foundation:experimental - enable building experimental features, known as highly unstable or without good support cross-platform
dev-haskell/freer-effects:pedantic - Pass additional warning flags and -Werror to GHC.
dev-haskell/freer-effects:test-hlint - Enable test suite that checks sources using HLint.
dev-haskell/ftphs:buildtests - Build the executable to run unit tests.
dev-haskell/gauge:analysis - Build with statistical analysis support
dev-haskell/ghc-exactprint:roundtrip - Build roundtripping executables
dev-haskell/ghc-heap-view:prim-supports-any - The used GHC supports Any as an argument to foreign prim functions (GHC ticket #5931)
dev-haskell/ghc-lib-parser-ex:ghc-lib - Force dependency on ghc-lib-parser even if GHC API in the ghc package is supported
dev-haskell/ghc-prof:dump - build 'dump' tool
dev-haskell/ghc-tcplugins-extra:deverror - Enables `-Werror` for development mode and TravisCI
dev-haskell/ghc-typelits-extra:deverror - Enables `-Werror` for development mode and TravisCI
dev-haskell/ghc-typelits-knownnat:deverror - Enables `-Werror` for development mode and TravisCI
dev-haskell/ghc-typelits-natnormalise:deverror - Enables `-Werror` for development mode and TravisCI
dev-haskell/gi-cairo-render:cairo-pdf - Build the PDF backend of Cairo.
dev-haskell/gi-cairo-render:cairo-ps - Build the PostScript backend of Cairo.
dev-haskell/gi-cairo-render:cairo-svg - Build the Scalable Vector Graphics (SVG) backend of Cairo.
dev-haskell/gi-cairo-render:cairo_pdf - Build the PDF backend of Cairo.
dev-haskell/gi-cairo-render:cairo_ps - Build the PostScript backend of Cairo.
dev-haskell/gi-cairo-render:cairo_svg - Build the Scalable Vector Graphics (SVG) backend of Cairo.
dev-haskell/github:openssl - Use http-client-openssl
dev-haskell/glfw:system-glfw - use media-libs/glfw instead of bundled version
dev-haskell/glib:closure-signals - Use the the GClosure-based signals implementation.
dev-haskell/gloss:glfw - Enable the GLFW backend
dev-haskell/gloss:glut - Enable the GLUT backend
dev-haskell/glutil:demos - Build demonstration programs
dev-haskell/gnuplot:buildexamples - Build test executables.
dev-haskell/gnuplot:executepipe - Avoid a temporary script by running with runInteractiveProcess.
dev-haskell/gnuplot:executeshell - Avoid a temporary script by calling via a UNIX shell and its piping syntax.
dev-haskell/graphscc:use-maps - Use IntMap instead of mutable arrays.
dev-haskell/gtk:deprecated - Include definitions in this library that are considered obsolete.
dev-haskell/gtk:fmode-binary - Set the default file translation mode for file I/O operations to _O_BINARY.
dev-haskell/gtk:gio - Depend on GIO package, thereby enabling certain features.
dev-haskell/gtk2hs-buildtools:closuresignals - Use the the GClosure-based signals implementation.
dev-haskell/gtk3:fmode-binary - Set the default file translation mode for file I/O operations to _O_BINARY.
dev-haskell/gtk3:gio - Depend on GIO package, thereby enabling certain features.
dev-haskell/hackage-db:install-examples - Build and install example programs.
dev-haskell/hackage-security:network-uri - Get Network.URI from the network-uri package.
dev-haskell/hakyll:buildwebsite - Build the hakyll website
dev-haskell/hakyll:checkexternal - Include external link checking
dev-haskell/hakyll:previewserver - Include the preview server
dev-haskell/hakyll:usepandoc - Include Pandoc support
dev-haskell/hakyll:watchserver - Include the watch server
dev-haskell/handsomesoup:network-uri - Get Network.URI from the network-uri package.
dev-haskell/happstack-plugins:tests - Build the testsuite, and include the tests in the library.
dev-haskell/happstack-server:network-uri - Get Network.URI from the network-uri package
dev-haskell/hashtables:bounds-checking - if on, use bounds-checking array accesses
dev-haskell/hashtables:debug - if on, spew debugging output to stdout
dev-haskell/hashtables:detailed-profiling - add detailed profiling information to profiled build-depends
dev-haskell/hashtables:portable - if on, use only pure Haskell code and no GHC extensions.
dev-haskell/hashtables:unsafe-tricks - turn on unsafe GHC tricks
dev-haskell/haskeline:terminfo - Use the terminfo package for POSIX consoles.
dev-haskell/haskellnet:network-bsd - Use network-bsd
dev-haskell/haxr:network-uri - Get Network.URI from the network-uri package
dev-haskell/hdbc-sqlite3:splitbase - Choose the new smaller, split-up package.
dev-haskell/hexpat:bundled-expat - Use bundled expat instead of dev-libs/expat
dev-haskell/highlighter:executable - Install a "highlighter" executable
dev-haskell/highlighting-kate:executable - Build the Highlight executable.
dev-haskell/highlighting-kate:pcre-light - Use the pcre-light library instead of regex-pcre-builtin.
dev-haskell/hip:disable-chart - Disable Chart-diagrams and Chart for a lighter dependency footprint
dev-haskell/hledger:terminfo - On POSIX systems, build with the terminfo lib for detecting terminal width.
dev-haskell/hledger:threaded - Build with support for multithreaded execution
dev-haskell/hledger-ui:threaded - Build with support for multithreaded execution
dev-haskell/hledger-web:library-only - Build for use with "yesod devel"
dev-haskell/hledger-web:threaded - Build with support for multithreaded execution.
dev-haskell/hlibsass:externallibsass - Use LibSass that is installed in the system
dev-haskell/hlibsass:sharedlibsass - Build LibSass as a shared library (only if external_libsass = False)
dev-haskell/hlint:ghc-lib - Force dependency on ghc-lib-parser even if GHC API in the ghc package is supported
dev-haskell/hlint:gpl - Use GPL libraries, specifically hscolour
dev-haskell/hlint:hsyaml - Use HsYAML instead of yaml
dev-haskell/hlint:threaded - Build with support for multithreaded execution
dev-haskell/hnix:optimize - Enable all optimization flags
dev-haskell/hnix:profiling - Enable profiling
dev-haskell/hnix-store-core:bounded-memory - Run tests of constant memory use (requires +RTS -T)
dev-haskell/hps:build-exec - Build the `hps-fractals` executable
dev-haskell/hs3:network-uri - Get Network.URI from the network-uri package
dev-haskell/hsexif:iconv - Enable encoding conversion of the User Comment tag with iconv. It's a nice thing to have but iconv is difficult to install on windows.
dev-haskell/hslogger:network-3 - Use network-3
dev-haskell/hslua:hardcode-reg-keys - Don't use CAPI to determine the names of certain registry key names but Use hard coded values for instead. This flag is required when compiling against Lua 5.3.3 or earlier, as those do not expose the necessary information in the @lauxlib.h@ header file.
dev-haskell/hsopenssl:fast-bignum - Enable fast moving of bignums between OpenSSL and GMP
dev-haskell/hsp:base4 - Use base-4.0.
dev-haskell/hsqml:enableqmldebugging - Allow the QML debug server to be enabled via Qt arguments.
dev-haskell/hsqml:forceghcilib - Force enable GHCi workaround library if not using shared libraries.
dev-haskell/hsqml:threadedtestsuite - Build test executable with the threaded RTS.
dev-haskell/hsqml:useexithook - Override the OnExitHook symbol to shutdown the Qt framework on exit.
dev-haskell/hsqml:usepkgconfig - Use pkg-config for libraries instead of the platform default mechanism.
dev-haskell/hsx:base4 - Use base-4.0.
dev-haskell/hsyslog:install-examples - Build and install example programs
dev-haskell/http:conduit10 - Use version 1.0.x or below of the conduit package (for the test suite)
dev-haskell/http:network-uri - Get Network.URI from the network-uri package
dev-haskell/http-api-data:text-show - Use text-show library for efficient ToHttpApiData implementations.
dev-haskell/http-api-data:use-text-show - Use text-show library for efficient ToHttpApiData implementations
dev-haskell/http-client:network-uri - Get Network.URI from the network-uri package.
dev-haskell/http-client-openssl:test-proxy - Test with http-proxy
dev-haskell/http-streams:network-uri - Get Network.URI from the network-uri package.
dev-haskell/httpd-shed:buildexamples - Build example executables.
dev-haskell/httpd-shed:network-bsd - Get Network.BSD from the network-bsd package.
dev-haskell/httpd-shed:network-uri - Get Network.URI from the network-uri package.
dev-haskell/hxt:profile - turn profiling on
dev-haskell/hxt-http:network-uri - Get Network.URI from the network-uri package
dev-haskell/hyphenation:embed - Embed data in library binary (Warning: This increases the executable size by about 1Mb unless unneeded language data files are manually removed from the "data" directory before compiling)
dev-haskell/icalendar:network-uri - use network-uri package
dev-haskell/ignore:without-pcre - Disable pcre support
dev-haskell/inflections:dev - Turn on development settings.
dev-haskell/influxdb:examples - Build examples
dev-haskell/inline-c:gsl-example - Build GSL example
dev-haskell/intervals:test-doctests - Enable the doctest suite when using the enable-tests option for cabal.
dev-haskell/io-streams:network - Include network support
dev-haskell/io-streams:zlib - Include zlib support
dev-haskell/ipython-kernel:examples - Build example programs
dev-haskell/jmacro:benchmarks - Build the benchmarks.
dev-haskell/jose-jwt:doctest - doctest
dev-haskell/jsaddle:call-stacks - Include HasCallStack constraint on calls unchecked calls
dev-haskell/jsaddle:check-unchecked - Fail unchecked calls when they are called (rather than when the result is evaluated)
dev-haskell/jsaddle-wkwebview:include-app-delegate - Include default AppDelegate C sources.
dev-haskell/json:mapdict - Encode Haskell maps as JSON dicts
dev-haskell/json:parsec - Add support for parsing with Parsec.
dev-haskell/json:pretty - Add support for using pretty printing combinators.
dev-haskell/judy:unsafe - Compile the library without locks. Code may be faster, but not threadsafe.
dev-haskell/juicypixels-extra:dev - Turn on development settings.
dev-haskell/language-c-quote:full-haskell-antiquotes - Support full Haskell expressions/patterns in antiquotes
dev-haskell/language-dot:executable - Build the `ppdot' executable
dev-haskell/ldap:buildtests - Build the executable to run unit tests.
dev-haskell/lens:benchmark-uniplate - 
dev-haskell/lens:dump-splices - 
dev-haskell/lens:inlining - 
dev-haskell/lens:j - 
dev-haskell/lens:old-inline-pragmas - 
dev-haskell/lens:safe - 
dev-haskell/lens:test-doctests - 
dev-haskell/lens:test-templates - 
dev-haskell/lens:trustworthy - 
dev-haskell/libyaml:no-unicode - Don't enable unicode output. Instead, unicode characters will be escaped.
dev-haskell/libyaml:system-libyaml - Use the system-wide libyaml instead of the bundled copy
dev-haskell/linear:template-haskell - Enable the use of the `template-haskell` package. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/linux-file-extents:examples - Build examples
dev-haskell/liquiddesugar:devel - Turn on stricter error reporting for development.
dev-haskell/liquidhaskell:deterministic-profiling - Support building against GHC with <https://phabricator.haskell.org/D4388> backported
dev-haskell/log-domain:ffi - Use C FFI to call math.h functions.
dev-haskell/logfloat:useffi - Use bindings to C libraries
dev-haskell/lukko:ofd-locking - Enable open file descriptor locking. Available on Linux (kernel 3.15, released Jun 8, 2014).
dev-haskell/massiv:unsafe-checks - Enable all the bounds checks for unsafe functions at the cost of significant performance penalty
dev-haskell/megaparsec-tests:dev - Turn on development settings.
dev-haskell/midi-alsa:buildexamples - Build example executables.
dev-haskell/miso:ios - Cross compile to iOS
dev-haskell/miso:jsaddle - Compile with JSaddle
dev-haskell/miso:tests - Builds Miso's tests
dev-haskell/missingh:network-3 - Use network-3
dev-haskell/mod:semirings - Derive semiring instances
dev-haskell/mod:vector - Derive unboxed and primitive vector instances
dev-haskell/modern-uri:dev - Turn on development settings.
dev-haskell/monad-logger:template-haskell - Enable Template Haskell support
dev-haskell/monad-par:chaselev - Use Chase-Lev Deques for higher-perf work-stealing.
dev-haskell/monky:ibus - enable ibus example
dev-haskell/monoidal-containers:split-these - Use split these/semialign packages
dev-haskell/multistate:build-example - Build the MultiState-example example program
dev-haskell/nats:binary - enable binary instances
dev-haskell/nats:hashable - enable hashable instances
dev-haskell/nats:template-haskell - enable template_haskell
dev-haskell/netlink:generators - build the generator scripts for constants
dev-haskell/network-data:small-base - Build the split-up base package.
dev-haskell/oeis:network-uri - Get Network.URI from the network-uri package.
dev-haskell/onrmt:brick017 - for Brick version 0.17 or later
dev-haskell/openclwrappers:link - Link against OpenCL library.
dev-haskell/opencv:internal-documentation - Enables documentation generation for internal modules.
dev-haskell/operational:buildexamples - Build example executables.
dev-haskell/optparse-simple:build-example - Build the example executable
dev-haskell/ormolu:dev - Turn on development settings.
dev-haskell/pandoc-citeproc:bibutils - Use Chris Putnam's Bibutils.
dev-haskell/pandoc-citeproc:debug - Turn on debug tracing.
dev-haskell/pandoc-citeproc:embed-data-files - Embed locale files into the library (needed for windows packaging)
dev-haskell/pandoc-citeproc:static - Use static linking.
dev-haskell/pandoc-citeproc:unicode-collation - Use Haskell bindings to the International Components for Unicode (ICU) libraries
dev-haskell/parsec-numbers:parsec1 - use dev-haskell/parsec1 instead of dev-haskell/parsec
dev-haskell/parsers:attoparsec - Enable the use of the `attoparsec` package
dev-haskell/parsers:parsec - Enable the use of the `parsec` package
dev-haskell/path:dev - Turn on development settings
dev-haskell/peggy:build-example - Build an example executable.
dev-haskell/persistent-mongodb:high-precision-date - Use a time storage with nano second precision.
dev-haskell/persistent-relational-record:test-examples - Test examples
dev-haskell/persistent-sqlite:build-sanity-exe - Build a sanity check test executable
dev-haskell/pipes-key-value-csv:devel - Development mode (-Werror)
dev-haskell/pointed:comonad - You can disable the use of the `comonad` package using `-f-transformers`.
dev-haskell/pointed:containers - You can disable the use of the `containers` package using `-f-containers`.
dev-haskell/pointed:kan-extensions - You can disable the use of the `kan-extensions` package using `-f-kan-extensions`.
dev-haskell/pointed:semigroupoids - You can disable the use of the `semigroupoids` package using `-f-semigroupoids`.
dev-haskell/pointed:semigroups - You can disable the use of the `semigroups` package using `-f-semigroups`.
dev-haskell/pointed:stm - You can disable the use of the `stm` package using `-f-stm`.
dev-haskell/pointed:tagged - You can disable the use of the `tagged` package using `-f-tagged`.
dev-haskell/pointed:transformers - You can disable the use of the `transformers` package using `-f-transformers`.
dev-haskell/pointed:unordered-containers - You can disable the use of the `unordered-containers` package using `-f-unordered-containers`.
dev-haskell/polysemy:dump-core - Dump HTML for the core generated by GHC during compilation
dev-haskell/polysemy:error-messages - Provide custom error messages
dev-haskell/polysemy-plugin:corelint - Perform the corelint tests
dev-haskell/poppler:gtk3 - Use GTK3 rather than GTK2
dev-haskell/postgresql-typed:aeson - Support decoding json via aeson.
dev-haskell/postgresql-typed:binary - Use binary protocol encoding via postgresql-binary. This may put additional restrictions on supported PostgreSQL server versions.
dev-haskell/postgresql-typed:hdbc - Provide an HDBC driver backend using the raw PostgreSQL protocol.
dev-haskell/postgresql-typed:md5 - Enable md5 password authentication method.
dev-haskell/postgresql-typed:scientific - Support decoding numeric via scientific (implied by binary).
dev-haskell/postgresql-typed:text - Support Text string values via text (implied by binary).
dev-haskell/postgresql-typed:tls - Enable TLS (SSL) support in PostgreSQL server connections.
dev-haskell/postgresql-typed:uuid - Support the UUID type via uuid (implied by binary).
dev-haskell/pretty-simple:buildexample - Build a small example program showing how to use the pPrint function
dev-haskell/pretty-simple:buildexe - Build a small command line program that pretty-prints anything from stdin.
dev-haskell/publicsuffixlist:create - export Network.PublicSuffixList.Create module
dev-haskell/publicsuffixlist:runtimelist - read suffix list from dist at startup instead of embedding list into library
dev-haskell/quickcheck:old-random - Build against a pre-1.2.0 version of the random package.
dev-haskell/quickcheck:template-haskell - Build Test.QuickCheck.All, which uses Template Haskell.
dev-haskell/quickcheck-classes:aeson - Enable the use of the `aeson` package. This may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/quickcheck-classes:binary-laws - Include infrastructure for testing class laws of binary type constructors. Disabling `unary-laws` while keeping `binary-laws` enabled is an unsupported configuration.
dev-haskell/quickcheck-classes:semigroupoids - Enable the use of the `semigroupoids` package. This may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/quickcheck-classes:semirings - Enable the use of the `semirings` package. This may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/quickcheck-classes:unary-laws - Include infrastructure for testing class laws of unary type constructors.
dev-haskell/quickcheck-classes:vector - Enable the use of the `vector` package. This may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/quickcheck-classes-base:binary-laws - Include infrastructure for testing class laws of binary type constructors. Disabling `unary-laws` while keeping `binary-laws` enabled is an unsupported configuration.
dev-haskell/quickcheck-classes-base:unary-laws - Include infrastructure for testing class laws of unary type constructors.
dev-haskell/random-bytestring:pcg - compile with support for PCG from pcg-random
dev-haskell/rasterific:embed-linear - Embed a reduced version of Linear avoiding a (huge) dep
dev-haskell/reactive-banana-wx:buildexamples - Build example executables.
dev-haskell/recaptcha:network-uri - Get Network.URI from the network-uri package.
dev-haskell/reflection:template-haskell - You can disable the use of the `template-haskell` package using `-f-template-haskell`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/reflex:debug-trace-events - Add instrumentation that outputs the stack trace of the definition of an event whenever it is subscribed to. Warning: It is very slow!
dev-haskell/reflex:fast-weak - Use the primitive implementation of FastWeak in GHCJS; note that this requires GHCJS to be built with FastWeak and FastWeakBag present in the RTS, which is not the default
dev-haskell/reflex:reflex-optimizer - Use the GHC plugin Reflex.Optimizer on some of the modules in the package. This is still experimental.
dev-haskell/reflex:split-these - Use split these/semialign packages
dev-haskell/reflex:template-haskell - Use template haskell to generate lenses
dev-haskell/retry:lib-werror - 
dev-haskell/rss:network-uri - Get Network.URI from the network-uri package.
dev-haskell/sample-frame:buildbenchmarks - Build and install benchmarking executable.
dev-haskell/sandi:conduit - Build with conduit
dev-haskell/sbv:skip-hlint-tester - Do not build the HLint tester
dev-haskell/sdl2:examples - Build opengl-example
dev-haskell/sdl2:no-linear - Do not depend on 'linear' library
dev-haskell/semialign:semigroupoids - Build with semigroupoids dependency
dev-haskell/semigroupoid-extras:profunctors - You can disable the use of the `profunctors` package using `-f-profunctors`. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroupoids:comonad - Enable the use of the `comonad` package. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Comonad`.
dev-haskell/semigroupoids:containers - Enable the use of the `containers` package. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroupoids:contravariant - Enable the use of the `contravariant` package. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Contravariant`
dev-haskell/semigroupoids:distributive - Enable the use of the `distributive`. Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users. If disabled we will not supply instances of `Distributive`
dev-haskell/semigroupoids:tagged - Enable the use of the `tagged` package. Disabing this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroupoids:unordered-containers - Enable the use of the `unordered-containers` package (and also its dependency `hashable`). Disabling this is an unsupported configuration, but it may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semigroups:binary - provide instances for binary package
dev-haskell/semigroups:transformers - provide instances for transformers package.
dev-haskell/semirings:containers - You can disable the use of the `containers` package using `-f-containers`. Disabling this may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/semirings:hashable - You can disable the use of the `hashable` package using `-f-hashable`. Disabling this may be useful for accelerating builds in sandboxes for expert users. Note: `-f-hashable` implies `-f-unordered-containers`, as we are necessarily not able to supply those instances as well.
dev-haskell/semirings:unordered-containers - You can disable the use of the `unordered-containers` package using `-f-unordered-containers`. Disabling this may be useful for accelerating builds in sandboxes for expert users.
dev-haskell/sendfile:portable - Explicitly enable portable sendfile support (implemented in Haskell)
dev-haskell/serversession-backend-redis:lib-werror - Add to -Werror to ghc option
dev-haskell/sha:exe - Build a sha1 and a sha384 executable similar to 'md5sum'.
dev-haskell/shake:cloud - Enable cloud build features
dev-haskell/shake:embed-files - Embed data files into the shake library
dev-haskell/shake:portable - Obtain FileTime using portable functions
dev-haskell/shakespeare:test-coffee - render tests through coffeescript render function
dev-haskell/shakespeare:test-export - 
dev-haskell/shakespeare:test-roy - render tests through roy render function
dev-haskell/shellac-compatline:editline - Use editline instead of readline backend.
dev-haskell/shelly:lifted - run the tests against Shelly.Lifted
dev-haskell/simple-affine-space:test-doc-coverage - Enable haddock coverage test suite
dev-haskell/simple-affine-space:test-hlint - Enable hlint test suite
dev-haskell/simple-sendfile:allow-bsd - Allow use of BSD sendfile (disable on GNU/kFreeBSD)
dev-haskell/skein:big-endian - When manually selecting the endianness, use big-endian (default is little-endian).
dev-haskell/skein:force-endianness - Use a manually selected endian when compiling (see flag 'big-endian').
dev-haskell/skein:reference - Use the reference implementation instead of the optimized one.
dev-haskell/skylighting:executable - Whether to build the skylighting program
dev-haskell/skylighting-core:executable - Build skylighting-extract tool
dev-haskell/snap-core:portable - No non-haskell unportable code.
dev-haskell/snap-server:build-pong - Build a server that just returns "PONG"? Normally useful only for benchmarks.
dev-haskell/snap-server:build-testserver - Build the blackbox testserver?
dev-haskell/snap-server:debug - Enable support for debugging.
dev-haskell/snap-server:openssl - Enable https support using the HsOpenSSL library.
dev-haskell/snap-server:portable - Compile in cross-platform mode. No platform-specific code or optimizations such as C routines will be used.
dev-haskell/some:newtype-unsafe - Use implementation using @newtype@ and unsafe @Any@, instead of GADT
dev-haskell/speculation:optimize - Enable optimizations
dev-haskell/sphinx:version-1-1-beta - By default this library is compatible with version 2.0 beta of Sphinx. Use this flag if you use Sphinx 1.1
dev-haskell/splitmix:optimised-mixer - Use JavaScript for mix32
dev-haskell/splitmix:random - Providen RandomGen SMGen instance
dev-haskell/sr-extra:network-uri - Get Network.URI from the network-uri package rather than the full network package.
dev-haskell/sr-extra:omit-data - Omit all Data instances
dev-haskell/sr-extra:omit-serialize - Omit all the Serialize instances, on the assumption that we will use SafeCopy instances instead.
dev-haskell/ssh-known-hosts:sample_progs - Build sample programs
dev-haskell/stack:developer-mode - By default, should extra developer information be output?
dev-haskell/stack:integration-tests - Run the integration test suite.
dev-haskell/stateref:usestm - Include instances for STM types.
dev-haskell/stateref:usetmvar - Include instances for TMVar.
dev-haskell/store-core:force-alignment - 
dev-haskell/streamly:debug - Debug build with asserts enabled
dev-haskell/streamly:dev - Development build
dev-haskell/streamly:examples - Build including examples
dev-haskell/streamly:examples-sdl - Build including SDL examples
dev-haskell/streamly:fusion-plugin - Use fusion plugin for benchmarks and executables
dev-haskell/streamly:llvm - Use llvm backend for better performance
dev-haskell/streamly:no-charts - Disable chart generation
dev-haskell/streamly:no-fusion - Disable rewrite rules
dev-haskell/streamly:streamk - Use CPS style streams when possible
dev-haskell/strict:assoc - Build with assoc dependency
dev-haskell/synthesizer-midi:buildexamples - Build example executables
dev-haskell/system-uuid:cli - Enable command line tool
dev-haskell/texmath:executable - Compile test executable.
dev-haskell/texmath:network-uri - Get Network.URI from the network-uri package
dev-haskell/text-short:asserts - Enable runtime-checks via 'assert'
dev-haskell/th-extras:base4 - Use base-4.0.
dev-haskell/themoviedb:maintainer - Enable settings for the package maintainer.
dev-haskell/these:assoc - Build with assoc dependency
dev-haskell/threepenny-gui:buildexamples - Build example executables.
dev-haskell/threepenny-gui:rebug - The library uses some techniques that are highly non-deterministic, for example garbage collection and concurrency. Bugs in these subsystems are harder to find. Activating this flag will expose more of them.
dev-haskell/thyme:bug-for-bug - bug-for-bug compatibility with time
dev-haskell/thyme:lens - use the full lens package
dev-haskell/thyme:show-internal - instance Show of internal representation
dev-haskell/tls:compat - Accept SSLv2 compatible handshake.
dev-haskell/tls:network - Use the base network library.
dev-haskell/transformers-base:orphaninstances - Build instances for orphan datatypes.
dev-haskell/tz:template-haskell - Enable the use of and export Template Haskell functionality. (Might need to disable this for cross-compiling.)
dev-haskell/unagi-chan:compare-benchmarks - 
dev-haskell/unix-compat:old-time - build against old-time package
dev-haskell/unordered-containers:debug - Enable debug support
dev-haskell/uri-encode:network-uri - Get Network.URI from the network-uri package.
dev-haskell/uri-encode:tools - Build executables.
dev-haskell/urlencoded:network-uri - Get Network.URI from the network-uri package
dev-haskell/uuagc:loag - Use MiniSat as external SAT-solver to schedule all Linear Ordered AGs
dev-haskell/vector:boundschecks - Enable bounds checking
dev-haskell/vector:internalchecks - Enable internal consistency checks at the cost of a significant performance penalty
dev-haskell/vector:unsafechecks - Enable bounds checking in unsafe operations at the cost of a significant performance penalty
dev-haskell/vector-algorithms:bench - Build a benchmarking program to test vector-algorithms performance
dev-haskell/vector-algorithms:boundschecks - Enable bounds checking
dev-haskell/vector-algorithms:internalchecks - Enable internal consistency checks at the cost of a significant performance penalty.
dev-haskell/vector-algorithms:properties - Enable the quickcheck tests
dev-haskell/vector-algorithms:unsafechecks - Enable bounds checking in unsafe operations at the cost of a significant performance penalty.
dev-haskell/vector-instances:hashable - use dev-haskell/hashable
dev-haskell/vinyl-utils:devel - Development mode (-Werror)
dev-haskell/void:safe - Disable effective but unsafe coercions
dev-haskell/wai-app-static:print - print debug info
dev-haskell/wai-extra:examples - Build example executable.
dev-haskell/warp:allow-sendfilefd - Allow use of sendfileFd (not available on GNU/kFreeBSD).
dev-haskell/warp:warp-debug - Add additional debuging information
dev-haskell/wcwidth:cli - Enable command line tool
dev-haskell/websockets:examples - Build the example server
dev-haskell/wreq:aws - Enable AWS tests
dev-haskell/wreq:httpbin - Install client
dev-haskell/xeno:libxml2 - Include libxml2 in the benchmarks
dev-haskell/xlsx:microlens - Use microlens instead of lens
dev-haskell/yaml:no-examples - don't build the examples
dev-haskell/yaml:no-exe - don't install the yaml2json or json2yaml executables
dev-haskell/yesod-auth:network-uri - Get Network.URI from the network-uri package
dev-haskell/yesod-auth-oauth2:examples - Build the example application
dev-haskell/yesod-form:network-uri - Get Network.URI from the network-uri package
dev-haskell/yesod-paginator:examples - Build the examples
dev-haskell/zip-archive:executable - Build the Zip executable.
dev-haskell/zlib:bundled-c-zlib - Use the bundled zlib C sources. Requires pkg-config to be False. For windows, this is the default.
dev-haskell/zlib:non-blocking-ffi - The (de)compression calls can sometimes take a long time, which prevents other Haskell threads running. Enabling this flag avoids this unfairness, but with greater overall cost.
dev-haskell/zxcvbn-hs:tools - Build the data processing tools (i.e. dictionary compilers)
dev-lang/cryptol:relocatable - Don't use the Cabal-provided data directory for looking up Cryptol libraries.
dev-lang/elm-compiler:dev - Turn off optimization and make warnings errors
dev-lang/ghc:binary - Install the binary version directly, rather than using it to build the source version.
dev-lang/ghc:elfutils - Enable DWARF-based backtraces using dev-libs/elfutils.
dev-lang/ghc:ghcbootstrap - Internal: Bootstrap GHC from an existing GHC installation.
dev-lang/ghc:ghcmakebinary - Internal: Build binary friendly for redistribution.
dev-lang/ghc:gmp - Use dev-libs/gmp for integer operations (works faster, but an external depend).
dev-lang/ghc:llvm - Enable LLVM backend via sys-devel/llvm.
dev-lang/ghc:numa - Enable NUMA thread balancing policy using sys-process/numactl.
dev-lang/idris:ffi - Build support for libffi.
dev-lang/purescript:release - prevents inclusion of extra info e.g. commit SHA in --version outpu
dev-util/brittany:brittany-dev-lib - set buildable false for anything but lib
dev-util/brittany:brittany-test-perf - determines if performance test suite is enabled
dev-util/bustle:interactivetests - Build interactive test programs
dev-util/bustle:threaded - Build with support for multithreaded execution.
dev-util/hsdev:docs - build with haddock/hdocs to support scanning docs
dev-util/hsdev:hlint - build with hlint to support linting
dev-vcs/darcs:curl - Use libcurl for HTTP support.
dev-vcs/darcs:terminfo - Use the terminfo package for enhanced console support.
dev-vcs/darcs:threaded - Use threading and SMP support.
dev-vcs/git-annex:assistant - Enable git-annex assistant and watch command
dev-vcs/git-annex:benchmark - Enable benchmarking
dev-vcs/git-annex:dbus - Enable dbus support
dev-vcs/git-annex:debuglocks - Debug location of MVar/STM deadlocks
dev-vcs/git-annex:gitlfs - Build with git-lfs library (rather than vendored copy)
dev-vcs/git-annex:httpclientrestricted - Build with http-client-restricted library (rather than vendored copy)
dev-vcs/git-annex:magicmime - Use libmagic to determine file MIME types
dev-vcs/git-annex:networkbsd - Build with network-3.0 which split out network-bsd
dev-vcs/git-annex:pairing - Enable pairing
dev-vcs/git-annex:s3 - Enable S3 support
dev-vcs/git-annex:torrentparser - Use haskell torrent library to parse torrent files
dev-vcs/git-annex:webapp - Enable git-annex webapp
dev-vcs/git-annex:webdav - Enable WebDAV support
games-puzzle/intricacy:curses - Enables curses user interface
games-puzzle/intricacy:sdl - Enables SDL user interface
games-puzzle/intricacy:server - Builds game server
games-puzzle/intricacy:sound - Enables sound in SDL user interface
media-sound/live-sequencer:gui - Build the wxWidgets GUI for the sequencer.
media-sound/live-sequencer:httpserver - Enable access to modules via a web browser.
sci-mathematics/agda:cpphs - Use cpphs instead of cpp.
sci-mathematics/agda:debug - Enable debugging features that may slow Agda down.
sci-mathematics/agda:enable-cluster-counting - Enable the --count-clusters flag. (If enable-cluster-counting is False, then the --count-clusters flag triggers an error message.)
sci-mathematics/agda:stdlib - Install the standard library.
www-apps/gitit:plugins - enables optional plugin runtime loader
www-servers/mighttpd2:tls - HTTPS support.
x11-misc/xmobar:alsa - Use alsa-mixer to get the volume from soundcards.
x11-misc/xmobar:dbus - Publish a service on the session bus for controlling xmobar.
x11-misc/xmobar:inotify - inotify support (modern Linux only). Required for the Mail and MBox plugins.
x11-misc/xmobar:iwlib - Wireless info support via Wext ioctls (deprecated). Required for the Wireless plugin, needs iwlib installed.
x11-misc/xmobar:mpd - MPD support. Needs libmpd installed.
x11-misc/xmobar:mpris - MPRIS v1, v2 support.
x11-misc/xmobar:rtsopts - Use -with-rtsopts=-V0 to reduce wakeups.
x11-misc/xmobar:timezone - Enables localized date support
x11-misc/xmobar:uvmeter - UVMeter only useful to australians.
x11-misc/xmobar:weather - Enable weather plugin.
x11-misc/xmobar:wifi - Wireless info support via nl80211. Required for the Wireless plugin on systems running Linux
x11-misc/xmobar:xft - Use Xft to render text. UTF-8 support included.
x11-misc/xmobar:xpm - Enable usage of xpm for icons.
x11-misc/xmonad-extras:brightness - Enable brightness control plugin
x11-misc/xmonad-extras:eval - Enable eval plugin
x11-misc/xmonad-extras:mpd - Enable mpd plugin
x11-misc/yeganesh:profiling - Build with profiling and -auto-all
x11-wm/xmonad:no-autorepeat-keys - Allow ignoring of keyboard autorepeat.