{
  description = "C Flake";

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

  outputs = { self, flake-utils, nixpkgs }:
  flake-utils.lib.eachDefaultSystem (system:
  let
    pkgs = import nixpkgs {
      inherit system;
      config.allowUnfree = true;
    };
  in {
    devShells.default = pkgs.mkShell {
      packages = with pkgs; [
        #cmake
        gcc
        #gccStdenv
        gnumake

        # valgrind

        #astyle

        # CUDA https://nixos.wiki/wiki/CUDA#cudatoolkit.2C_cudnn.2C_and_related_packages
#        git gitRepo gnupg autoconf curl
#        procps gnumake util-linux m4 gperf unzip
#        cudatoolkit linuxPackages.nvidia_x11
#        libGLU libGL
#        xorg.libXi xorg.libXmu freeglut
#        xorg.libXext xorg.libX11 xorg.libXv xorg.libXrandr zlib
#        xorg.libXinerama
#        ncurses5 stdenv.cc binutils
#
#        glib
#        glibc
#
#        intel-ocl
#        intel-compute-runtime
#        opencl-clhpp
#        opencl-clang
#        opencl-headers
#        ocl-icd
#
#        pkgconf
#        waylandpp
#        xorg.libXcursor

        # You might want to use your own IDE.
        #(jetbrains.plugins.addPlugins jetbrains.clion [ "github-copilot" ])
        #vscodium
      ];

      shellHook = ''
        export CUDA_PATH=${pkgs.cudatoolkit}
        # export LD_LIBRARY_PATH=${pkgs.linuxPackages.nvidia_x11}/lib:${pkgs.ncurses5}/lib
        # export LD_LIBRARY_PATH="${pkgs.stdenv.cc.cc.lib}/lib"
        export LD_LIBRARY_PATH="${pkgs.libGL}/lib/:${pkgs.stdenv.cc.cc.lib}/lib/:${pkgs.glibc}/lib"
        export EXTRA_LDFLAGS="-L/lib -L${pkgs.linuxPackages.nvidia_x11}/lib"
        export EXTRA_CCFLAGS="-I/usr/include"
      '';
    };
  });
}