diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d79abb2..fda6189 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -28,9 +28,12 @@ distros:
       dotenv: build.env
     paths:
       - .gitlab-ci-build.yml
-  script: |-
-    xonsh ./build.xsh -a --list
-    echo "BUILD=$(date +'%Y.%m.%d.%H')" >> build.env
+  tags:
+    - nix
+  script:
+    - nix build ".#continue"
+    - cp result .gitlab-ci-build.yml
+    - cat result
 
 validate:
   stage: lint