anchor.diff:  { lib, stdenv, fetchurl, gnugrep, findutils }:
   
   let
  -  version = "22-1.1ubuntu1"; # Zesty
  +  version = "28-1ubuntu4"; # impish 2021-06-24
   
   in stdenv.mkDerivation {
     pname = "kmod-blacklist";
  
positive.code: 
    src = fetchurl {
      url = "https://launchpad.net/ubuntu/+archive/primary/+files/kmod_${version}.debian.tar.xz";
      sha256 = "1k749g707ccb82l4xmrkp53khl71f57cpj9fzd1qyzrz147fjyhi";
    };
  
    installPhase = ''
  
negative.code:   '';
  
    meta = with lib; {
      homepage = "https://launchpad.net/ubuntu/+source/kmod";
      description = "Linux kernel module blacklists from Ubuntu";
      platforms = platforms.linux;
      license = with licenses; [ gpl2Plus lgpl21Plus ];
  