{
  inputs = {
    # nixos-unstable : doit rester aligne sur la branche du systeme (NixOS 26.11,
    # glibc 2.44). Un pin plus vieux (ex. 25.05/26.05 -> glibc 2.42) casse le
    # chargement du driver GPU (/run/opengl-driver, construit pour glibc 2.44).
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    flake-parts.url = "github:hercules-ci/flake-parts";
    systems.url = "github:nix-systems/default";
  };

  outputs = inputs:
    inputs.flake-parts.lib.mkFlake { inherit inputs; } {
      systems = import inputs.systems;

      perSystem = { pkgs, lib, ... }:
        let
          # JDK 25 : exige par le toolchain Gradle 9 (build.gradle / runClient).
          java = pkgs.jdk25;

          nativeBuildInputs = with pkgs; [
            java
            git
          ];

          buildInputs = with pkgs; [
            # OpenGL
            libGL
            mesa

            # X11 — requis par LWJGL 3 (client MC 26.3 / runClient)
            libx11
            libxcursor
            libxext
            libxi
            libxinerama
            libxrandr
            libxxf86vm
            libxrender
            libxfixes

            # Audio
            libpulseaudio
            flite
          ];
        in {
          devShells.default = pkgs.mkShell {
            inherit nativeBuildInputs buildInputs;

            env = {
              JAVA_HOME = "${java.home}";
              LD_LIBRARY_PATH = lib.makeLibraryPath buildInputs;
            };
          };
        };
    };
}