Lock file maintenance

.gitea/workflows/nix-flake-check.yaml

@@ -4,8 +4,18 @@ on: push
 jobs:
   nix-flake-update:
     runs-on: ubuntu-latest
-    container: nixpkgs/nix-flakes
     steps:
       - uses: actions/checkout@v4
+      - name: Install Nix
+        run: |
+          sh <(curl -L https://nixos.org/nix/install) --no-daemon --no-channel-add
+          mkdir -p ~/.config/nix
+          touch ~/.config/nix/nix.conf
+          echo "max-jobs = auto" >> ~/.config/nix/nix.conf
+          echo "cores = 0" >> ~/.config/nix/nix.conf
+          echo "experimental-features = nix-command flakes" >> ~/.config/nix/nix.conf
+          echo "/nix/var/nix/profiles/per-user/$USER/profile/bin" >> "$GITHUB_PATH"
+          echo "/nix/var/nix/profiles/default/bin" >> "$GITHUB_PATH"
       - name: Check flake
-        run: nix flake check
+        run: nix flake check --all-systems
+