chore: nix check @ ci

.github/workflows/nix.yml

@@ -0,0 +1,37 @@
+name: 📦 Nix Build
+
+on:
+  push:
+    branches: [ main ]
+
+  pull_request:
+    branches: [ '**' ]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  run-checks:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    steps:
+      - name: Install Protoc
+        uses: arduino/setup-protoc@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Checkout Repository
+        uses: actions/checkout@v3
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v4
+
+      - name: Check Nix flake inputs
+        uses: DeterminateSystems/flake-checker-action@v5
+
+      - name: Nix Build
+        run: |
+          nix develop --show-trace -c irust --version
+          nix develop --show-trace -c rustc --version

flake.nix

@@ -5,6 +5,12 @@
     # we leverage unstable due to wasm-tools/wasm updates
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
     flake-utils.url = "github:numtide/flake-utils";
+
+    flake-compat = {
+      url = "github:edolstra/flake-compat";
+      flake = false;
+    };
+
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -15,6 +21,7 @@
   outputs = {
     self,
     nixpkgs,
+    flake-compat,
     flake-utils,
     rust-overlay,
   } @ inputs:
@@ -193,6 +200,7 @@
               darwin.apple_sdk.frameworks.CoreFoundation
               darwin.apple_sdk.frameworks.Foundation
             ];
+          NIX_PATH = "nixpkgs=" + pkgs.path;
           RUST_BACKTRACE = 1;
 
           shellHook = ''