nixpkgs/pkgs/os-specific/darwin/apple-source-releases/removefile/default.nix

{ stdenv, appleDerivation }:

appleDerivation {
  phases = [ "unpackPhase" "installPhase" ];

  installPhase = ''
    mkdir -p $out/include/
    cp removefile.h checkint.h $out/include/
  '';
}