diff --git a/.forgejo/workflows/test.yaml b/.forgejo/workflows/test.yaml
index f024f1d..71528db 100644
--- a/.forgejo/workflows/test.yaml
+++ b/.forgejo/workflows/test.yaml
@@ -1,6 +1,7 @@
 on: [push]
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: docker://nixos/nix
     steps:
       - run: echo All very good
+      - run: nix --version