Build images other than linters

.gitlab-ci.yml

@@ -17,10 +17,15 @@ variables:
       CONTAINER_IMAGE="$CONTAINER_IMAGE_BASE/$IMAGE"
       docker login -u gitlab-ci-token -p $CI_JOB_TOKEN registry.gitlab.haskell.org
       docker pull $CONTAINER_IMAGE:latest || true
-      docker build --cache-from $CONTAINER_IMAGE:latest --tag $CONTAINER_IMAGE:$CI_COMMIT_SHA --tag $CONTAINER_IMAGE:latest linters/
+      docker build --cache-from $CONTAINER_IMAGE:latest --tag $CONTAINER_IMAGE:$CI_COMMIT_SHA --tag $CONTAINER_IMAGE:latest $IMAGE
       docker push $CONTAINER_IMAGE:$CI_COMMIT_SHA
       docker push $CONTAINER_IMAGE:latest
 
+build-linters:
+  extends: .build
+  variables:
+    IMAGE: linters
+
 build-aarch64-linux-deb9:
   extends: .build
   variables: