.gitlab-ci.yml

 ---
-default:
-  image: 'docker:19.03.13'
-
 stages:
   - 'sync'
 
-'Sync gentoo/stage3:amd64-systemd':
+default:
+  image: '${CI_REGISTRY}/nest/tools/buildah:${CI_HOST_PLATFORM}'
+  before_script:
+    - 'buildah login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" "$CI_REGISTRY"'
+
+'Sync amd64':
+  stage: 'sync'
+  variables:
+    ARCH: 'amd64'
+  script: &script
+    - 'buildah pull gentoo/stage3:${ARCH}'
+    - 'buildah tag gentoo/stage3:${ARCH} "${CI_REGISTRY_IMAGE}:${ARCH}"'
+    - 'buildah push "${CI_REGISTRY_IMAGE}:${ARCH}"'
+
+'Sync arm64':
   stage: 'sync'
-  tags: ['docker']
-  script:
-    - 'docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY'
-    - 'docker pull gentoo/stage3:amd64-systemd'
-    - 'docker tag gentoo/stage3:amd64-systemd $CI_REGISTRY_IMAGE:amd64-systemd'
-    - 'docker push $CI_REGISTRY_IMAGE:amd64-systemd'
+  variables:
+    ARCH: 'arm64'
+  script: *script