diff --git a/.forgejo/workflows/build.yaml b/.forgejo/workflows/build.yaml
index 9fb5c88..77b0202 100644
--- a/.forgejo/workflows/build.yaml
+++ b/.forgejo/workflows/build.yaml
@@ -1,6 +1,7 @@
 on: [push]
 jobs:
   test:
+    container: nixos/nix
     steps:
       - run: echo ciao
       - run: nix --version