Draft: Add Nix to the GitHub build workflow

.github/workflows/flake.nix

@@ -0,0 +1,60 @@
+{
+  description = "Shipwright development environment";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            # Build tools
+            clang
+            git
+            cmake
+            ninja
+            lsb-release
+            pkg-config
+
+            # SDL2 libraries
+            SDL2
+            SDL2.dev
+            SDL2_net
+
+            # Other libraries
+            libpng
+            libzip
+            nlohmann_json
+            tinyxml-2
+            spdlog
+            libGL
+            libGL.dev
+            bzip2
+
+            # X11 libraries
+            xorg.libX11
+
+            # Audio libraries
+            libogg
+            libogg.dev
+            libvorbis
+            libvorbis.dev
+            libopus
+            libopus.dev
+            opusfile
+            opusfile.dev
+          ];
+
+          shellHook = ''
+            echo "Shipwright development environment loaded"
+            echo "Available tools: clang, git, cmake, ninja"
+          '';
+        };
+      });
+}

.github/workflows/test-builds-on-distros.yml

@@ -8,8 +8,8 @@ jobs:
   build:
     strategy:
       matrix:
-        image: ["archlinux:base", "opensuse/tumbleweed:latest", "ubuntu:mantic", "debian:bookworm", "fedora:39"]
-        cc: ["gcc", "clang"] 
+        image: ["archlinux:base", "opensuse/tumbleweed:latest", "ubuntu:mantic", "debian:bookworm", "fedora:39", "nixos/nix:latest"]
+        cc: ["gcc", "clang"]
         include:
         - cxx: g++
           cc: gcc
@@ -48,6 +48,10 @@ jobs:
         echo zypper in ${{ matrix.cc }} ${{ (matrix.cxx == 'g++' && 'gcc-c++') || '' }} ${{ matrix.cc == 'clang' && 'libstdc++-devel' || '' }} git cmake ninja SDL2-devel libpng16-devel libzip-devel libzip-tools nlohmann_json-devel tinyxml2-devel spdlog-devel
         zypper --non-interactive dup
         zypper --non-interactive in ${{ matrix.cc }} ${{ (matrix.cxx == 'g++' && 'gcc-c++') || '' }} ${{ matrix.cc == 'clang' && 'libstdc++-devel' || '' }} git cmake ninja SDL2-devel libpng16-devel libzip-devel libzip-tools nlohmann_json-devel tinyxml2-devel spdlog-devel
+    - name: Install dependencies (Nix)
+      if: ${{ matrix.image == 'nix/nixos:latest' }}
+      run: |
+        nix develop .github/workflows/flake.nix
     - name: Install latest nlohmann
       if: ${{ matrix.image == 'fedora:39' }}
       run: |