diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 73a9d50c18..13d2c88ef8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -85,6 +85,11 @@ workflow:
     - x86_64-linux
   image: "registry.gitlab.haskell.org/ghc/ci-images/x86_64-linux-fedora33:$DOCKER_REV"
 
+.x86_64-linux-fedora27:
+  tags:
+    - x86_64-linux
+  image: "registry.gitlab.haskell.org/ghc/ci-images/x86_64-linux-fedora27:$DOCKER_REV"
+
 .x86_64-linux-alpine:
   tags:
     - x86_64-linux
@@ -300,6 +305,52 @@ test-x86_64-linux-fedora33:
   before_script:
     - sudo dnf install -y tree
 
+######################
+# x86_64 linux unknown
+######################
+
+build-x86_64-linux-unknown:
+  extends:
+    - .build
+    - .x86_64-linux-fedora27
+  before_script: |
+    echo "NAME=Linux" > ~/os-release.fake
+    echo "ID=linux" >> ~/os-release.fake
+    echo "PRETTY_NAME=Linux" >> ~/os-release.fake
+    sudo ln -sf /home/ghc/os-release.fake /etc/os-release
+    sudo dnf install -y patchelf tree
+  variables:
+    ADD_CABAL_ARGS: "--enable-split-sections"
+
+tar-x86_64-linux-unknown:
+  extends:
+    - .artifacts
+    - .x86_64-linux-fedora27
+  stage: tar
+  needs: ["build-x86_64-linux-unknown"]
+  before_script: |
+    echo "NAME=Linux" > ~/os-release.fake
+    echo "ID=linux" >> ~/os-release.fake
+    echo "PRETTY_NAME=Linux" >> ~/os-release.fake
+    sudo ln -sf /home/ghc/os-release.fake /etc/os-release
+  script:
+    - ./.gitlab/tar.sh
+  variables:
+    TARBALL_ARCHIVE_SUFFIX: x86_64-unknown-linux
+    TARBALL_EXT: tar.xz
+
+test-x86_64-linux-unknown:
+  extends:
+    - .test
+    - .x86_64-linux-fedora27
+  needs: ["tar-x86_64-linux-unknown"]
+  before_script: |
+    echo "NAME=Linux" > ~/os-release.fake
+    echo "ID=linux" >> ~/os-release.fake
+    echo "PRETTY_NAME=Linux" >> ~/os-release.fake
+    sudo ln -sf /home/ghc/os-release.fake /etc/os-release
+    sudo dnf install -y tree
+
 
 ######################
 # x86_64 linux alpine
diff --git a/.gitlab/ci.sh b/.gitlab/ci.sh
index 751b09c7ea..fa321668a6 100755
--- a/.gitlab/ci.sh
+++ b/.gitlab/ci.sh
@@ -80,6 +80,7 @@ case "$(uname)" in
 		cp "$(cabal list-bin -v0 ${args[@]} exe:hls-wrapper)" "$CI_PROJECT_DIR/out/haskell-language-server-wrapper"$EXE_EXTENSION
         ;;
 	*)
+		ghcup debug-info
 		sed -i.bak -e '/DELETE MARKER FOR CI/,/END DELETE/d' cabal.project # see comment in cabal.project
 		emake --version
 		emake GHCUP=ghcup hls