{ pkgs, ... }:
{
  flatMap = (f: list: builtins.foldl' (acc: elem: acc // elem) {} (builtins.map f list));
  flatMapS = (f: list: builtins.foldl' (acc: elem: acc + elem) "" (builtins.map f list));
  git-forward-shell = pkgs.stdenv.mkDerivation {
    name = "git-forward-shell";
    passthru = {
      shellPath = "/bin/git-forward-shell";
    };
    phases = [ "installPhase" ];
    src = pkgs.writeScriptBin "git-forward-shell" ''
    #!/bin/sh
    ssh -p 2222 -o StrictHostKeyChecking=no git@gitea.containers "SSH_ORIGINAL_COMMAND=\"$SSH_ORIGINAL_COMMAND\" bash $@"
    '';
    installPhase = ''
      cp -r $src $out
    '';
  };
}