Create nix-build-checker workflow

.github/workflows/nix-build-checker.yml

@@ -0,0 +1,16 @@
+name: nix-build-checker
+on:
+  push:
+permissions: {}
+jobs:
+  run-nix-build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - name: Install Nix
+        uses: cachix/install-nix-action@v26
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+      - name: Run nix flake check --all-systems
+        run: nix flake check --all-systems

flake.nix

@@ -0,0 +1,34 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    flake-parts = {
+      url = "github:hercules-ci/flake-parts";
+      inputs.nixpkgs-lib.follows = "nixpkgs";
+    };
+  };
+
+  outputs =
+    inputs:
+    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+
+      perSystem =
+        { pkgs, ... }:
+        let
+          libxcb-errors = pkgs.callPackage ./. { };
+        in
+        {
+          checks = {
+            inherit libxcb-errors;
+          };
+
+          packages = {
+            inherit libxcb-errors;
+            default = libxcb-errors;
+          };
+        };
+    };
+}