flake.nix

{
  description = "A Nix-flake-based Competitive Programmings environment";

  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";

  outputs = { self, nixpkgs }:
    let
      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
      forEachSupportedSystem = f: nixpkgs.lib.genAttrs supportedSystems (system: f {
        pkgs = import nixpkgs { inherit system; };
      });
    in
    {
      devShells = forEachSupportedSystem ({ pkgs }: {
        default = pkgs.mkShell {
          packages = with pkgs; [
            gcc7
            gdb

            clang-tools_17
            cling
            python3
          ];

          shellHook = ''
            export CPLUS_INCLUDE_PATH=${pkgs.gcc7.cc.outPath + "/include/c++/7.5.0"}
          '';
        };
      });
    };
}