{ pkgs ? import <nixpkgs> { }, name ? "user-env"  }: with pkgs;
buildEnv {
  inherit name;
  extraOutputsToInstall = [ "out" "man" "lib"  ]; # to get all needed symlinks
  paths = [
    #nix # if not on NixOS, this is needed
    direnv
    nixVersions.unstable #nixFlakes
    nix-prefetch-git
    validatePkgConfig
    nix-tree jq nix-output-monitor
    git
    ps
    ### d_build_related
    dub
    ## compiler
    dmd
    ldc
    #gdc
    #rund
    ## linker
    #lld
    #mold
    ## builder
    #ninja
    #meson
    ### sqlite search related
    sqlite
    # this will create a script that will rebuild and upgrade your setup; using shell script syntax
    (writeScriptBin "nix-rebuild" ''
      #!${stdenv.shell}
      cd <path-to-flake> || exit 1
      nix flake update
      nix profile upgrade '.*'
    '')
    # puts in your root the nixpkgs version
      (writeTextFile {
      name = "nixpkgs-version";
      destination = "/nixpkgs-version";
      text = lib.version;
       })
  ];
}