Simplify CI

.github/workflows/ci.yml

@@ -28,8 +28,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - name: Install Nix
-        uses: cachix/install-nix-action@v17
       - name: Install Rust
         uses: actions-rs/toolchain@v1
         with:
@@ -52,8 +50,6 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - name: Install Nix
-        uses: cachix/install-nix-action@v17
       - name: Install Rust
         uses: actions-rs/toolchain@v1
         with:
@@ -65,7 +61,7 @@ jobs:
         run: cargo test --all -- --include-ignored
 
   nix-flake:
-    name: Nix packaging (flake)
+    name: Nix package (flake)
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
@@ -81,7 +77,7 @@ jobs:
         run: nix build --no-update-lock-file --show-trace --verbose --print-build-logs
 
   nix-legacy:
-    name: Nix packaging (legacy)
+    name: Nix package (legacy)
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
@@ -97,4 +93,4 @@ jobs:
         with:
           nix_path: nixpkgs=channel:nixpkgs-unstable
       - name: Nix build
-        run: nix-build
+        run: nix-build --show-trace --verbose