anchor.diff: -{ lib, stdenv, fetchFromGitHub, bash, coreutils, gdb, zlib }:
  +{ lib, stdenv, fetchFromGitHub, fetchpatch, bash, coreutils, gdb, zlib }:
   
   stdenv.mkDerivation rec {
     pname = "procdump";
  
positive.code:     rev = version;
      sha256 = "sha256-gVswAezHl7E2cBTJEQhPFXhHkzhWVHSpPF8m0s8+ekc=";
    };
  
    nativeBuildInputs = [ zlib ];
    buildInputs = [ bash coreutils gdb ];
  
negative.code:     "INSTALLDIR=/bin"
      "MANDIR=/share/man/man1"
    ];
  
    enableParallelBuilding = true;
  
    doCheck = false; # needs sudo root
  
  