foo.nix

{ pkgs, ... }:
let
  mctt = stdenv.mkDerivation rec {
    name = "mcct-0.01";
    dontBuild = true;
    src = /home/days/.communi;
    #mkdir -p $out/share/{doc,fonts/opentype}
    installPhase = ''
      ls -a
      cp -Rpv  ntt $out/share/communi/themes
    '';

    meta = with stdenv.lib; {
      description = "custom theme for communi";
      license = licenses.ofl;
      platforms = platforms.all;
    };
  };
in {
  environment.systemPackages = with pkgs; [ mcct ];
}