diff --git a/.forgejo/workflows/flake-check.yml b/.forgejo/workflows/flake-check.yml
index 002f079..0c8a643 100644
--- a/.forgejo/workflows/flake-check.yml
+++ b/.forgejo/workflows/flake-check.yml
@@ -5,6 +5,8 @@ on: [pull_request]
 jobs:
   flake-check:
     runs-on: runner
+    env:
+      NIXPKGS_ALLOW_UNFREE: 1
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4