Working flake.nix for dolphin emulator fork executable Ishiiruka-Slippi 3.4.6

flake.nix

{
  description = "Dev-shell with all runtime libs for Ishiiruka-Slippi v3.4.6";

  inputs = {
    nixpkgs.url      = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url  = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }@inputs:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          config.allowUnfree = true;    # ffmpeg-full, etc.
        };

        runtimeLibs = with pkgs; [
          # ── core GNOME stack ─────────────────────────────────────────
          glib                           # libgobject-2.0.so.0, libglib-2.0.so.0
          # ── audio / input ───────────────────────────────────────────
          alsa-lib libpulseaudio libevdev libusb1 udev hidapi bluez
          # ── video / windowing ───────────────────────────────────────
          libGL mesa
          xorg.libX11 xorg.libXext xorg.libXi xorg.libXrandr xorg.libXcursor xorg.libXinerama xorg.libXfixes
          xorg.libSM xorg.libICE                # ← NEW: libSM.so.6 / libICE.so.6
          pango
          gdk-pixbuf
          fontconfig
          fribidi
          harfbuzz
          libdrm
          freetype
          xorg.libxcb
          p11-kit
          gmp
          libgpg-error
          gdk-pixbuf
          # ── media / networking helpers ──────────────────────────────
          ffmpeg-full curl enet miniupnpc lz4 lzo zlib libspng
          # ── UI toolkit ──────────────────────────────────────────────
          qt5.qtbase                     # Ishiiruka is still Qt 5
          # ── optional back-ends ──────────────────────────────────────
          SDL2
        ];

        libPath = pkgs.lib.makeLibraryPath runtimeLibs;
      in {
        # <- this name makes `nix develop` find it automatically
        devShells.default = pkgs.mkShell {
          name = "ishiiruka-slippi-runtime";

          packages =
            runtimeLibs
            ++ [ pkgs.steam-run  pkgs.patchelf pkgs.glibc.bin ];

          # expose libs for the unpatched binary
          LD_LIBRARY_PATH = libPath;

          shellHook = ''
            export LD_LIBRARY_PATH=${libPath}:$LD_LIBRARY_PATH
            echo
            echo ">> Ishiiruka runtime environment ready."
            echo "   Download Slippi_Online-x86_64.AppImage and run:"
            echo "     steam-run ./Slippi_Online-x86_64.AppImage"
            echo
          '';
        };
      });
}