diff --git a/.forgejo/workflows/test.yaml b/.forgejo/workflows/test.yaml
index 71528db..b79724c 100644
--- a/.forgejo/workflows/test.yaml
+++ b/.forgejo/workflows/test.yaml
@@ -1,7 +1,9 @@
 on: [push]
 jobs:
   test:
-    runs-on: docker://nixos/nix
+    runs-on: ubuntu-latest
+    container:
+      image: nixos/nix:2.18.7
     steps:
       - run: echo All very good
       - run: nix --version