diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b7133a53ccb7981679e81a9cb663db150be42d1f..b7bba35582872e73b6e2d433ca6270a987dd16a0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -6,7 +6,7 @@ nix:
   script:
     - nix-channel --add https://nixos.org/channels/nixos-19.03 nixpkgs
     - nix-channel --update
-    - nix-build
+    - nix-build -A firmware
   artifacts:
     paths:
      - result/apps