diff --git a/.gitea/workflows/eval.yml b/.gitea/workflows/eval.yml
index 0943b47..1d11f59 100644
--- a/.gitea/workflows/eval.yml
+++ b/.gitea/workflows/eval.yml
@@ -5,10 +5,20 @@ on:
 jobs:
   nix-flake-eval:
     name: Nix flake eval
-    runs-on: ubuntu-latest
+    runs-on: debian-latest
     steps:
-    - uses: actions/checkout@v4
-    - run: apt-get update && apt-get -y install sudo
-    - uses: https://github.com/cachix/install-nix-action@v30
-    - run: echo -e "show-trace = true\nmax-jobs = auto\ntrusted-users = root\nexperimental-features = nix-command flakes\nbuild-users-group =" > /etc/nix/nix.conf
+    - name: Install sudo
+      run: apt-get install --update --assume-yes sudo
+
+    - uses: actions/checkout@v6
+
+    - uses: https://github.com/cachix/install-nix-action@v31
+      with:
+        extra_nix_config: |
+          show-trace = true
+          max-jobs = auto
+          trusted-users = root
+          experimental-features = nix-command flakes
+          build-users-group =
+
     - run: nix flake check