anchor.diff:    doCheck = true;
     checkTarget = "verify";
   
  +  postInstall = ''
  +    # The patch installs build header
  +    rm $out/include/reglib/keys-gcrypt.h
  +  '';
  +
     meta = with stdenv.lib; {
       description = "Linux wireless Central Regulatory Domain Agent";
       longDescription = ''
  
positive.code:     url = "http://kernel.org/pub/software/network/crda/crda-${version}.tar.xz";
    };
  
    buildInputs = [ libgcrypt libnl ];
    nativeBuildInputs = [
      pkgconfig python2Packages.m2crypto python2Packages.python
    ];
  
    postPatch = ''
  
negative.code: { stdenv, fetchurl, fetchpatch, libgcrypt, libnl, pkgconfig, python3, wireless-regdb }:
  
  stdenv.mkDerivation rec {
    pname = "crda";
  