update CI

.github/workflows/test.yml

@@ -39,3 +39,25 @@ jobs:
     # will ensure we have all our dependencies.
     - name: test
       run: nix develop -c zig build -Dtarget=${{ matrix.target }}
+
+  test:
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+      with:
+        submodules: recursive
+        fetch-depth: 0
+
+    # Install Nix and use that to run our tests so our environment matches exactly.
+    - uses: cachix/install-nix-action@v17
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+
+    # Run our go tests within the context of the dev shell from the flake. This
+    # will ensure we have all our dependencies.
+    - name: test
+      run: nix develop -c zig build test