fixup! Update ci workflow to work with forgejo

.github/workflows/ci.yml

@@ -15,13 +15,19 @@ jobs:
     runs-on: ubuntu-22.04
     container: nixpkgs/nix-flakes:nixos-24.05
     steps:
-      - name: Checkout lfs
+      - name: Setup NIX CI Environment
+        run: |
+          nix profile install nixpkgs#git-lfs
+          echo "substituters = https://nixpkgs-cache.qo.is?priority=39" >> /etc/nix/nix.conf
+          echo "trusted-public-keys = cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=" >> /etc/nix/nix.conf
+          mkdir -p ~/.config/nix && cp /etc/nix/nix.conf ~/.config/nix/
+      - name: Checkout Repository
         shell: "nix shell nixpkgs#git-lfs --command {0}"
         run: |
           git clone --no-checkout https://oauth2:$GITHUB_TOKEN@git.qo.is/$GITHUB_REPOSITORY .
           git lfs install --local
-          git lfs fetch $GITHUB_REF
           git checkout --recurse-submodules $GITHUB_REF
+          git lfs pull
       - name: Run Nix Build
         shell: "nix shell nixpkgs#git-lfs --command {0}"
         run: nix build .