diff --git a/.gitea/workflows/checks.yaml b/.gitea/workflows/checks.yaml
index 11d0bb7..cc912c8 100644
--- a/.gitea/workflows/checks.yaml
+++ b/.gitea/workflows/checks.yaml
@@ -6,7 +6,7 @@ on:
       - main
 jobs:
   checks-impure:
-    runs-on: nix
+    runs-on: nixos
     steps:
       - uses: actions/checkout@v3
       - run: nix flake check