ci: fix failing tests

.github/workflows/test.yml

@@ -10,12 +10,13 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     permissions:
-      # permissions required for nix caching to work properly
       id-token: write
       contents: read
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/determinate-nix-action@v3
+      - uses: DeterminateSystems/flakehub-cache-action@main
+      - uses: DeterminateSystems/flake-checker-action@main
       - name: Install devenv.sh
         run: nix profile install nixpkgs#devenv
       - name: Cache turbo build

.vscode/settings.json

@@ -22,6 +22,7 @@
         "microflash",
         "nixd",
         "nixfmt",
+        "nixos",
         "nixpkgs",
         "nojs",
         "noopener",