anchor.diff: -{ lib, stdenv, fetchurl, ncurses, pkg-config }:
  +{ lib, stdenv, fetchurl, fetchpatch, ncurses, pkg-config }:
   
   stdenv.mkDerivation rec {
     version = "6.5.0";
  
positive.code:     url = "https://www.vanheusden.com/multitail/${pname}-${version}.tgz";
      sha256 = "1vd9vdxyxsccl64ilx542ya5vlw2bpg6gnkq1x8cfqy6vxvmx7dj";
    };
  
    nativeBuildInputs = [ pkg-config ];
  
  
negative.code:   '';
  
    meta = {
      homepage = "https://github.com/halturin/multitail";
      description = "tail on Steroids";
      maintainers = with lib.maintainers; [ matthiasbeyer ];
      platforms = lib.platforms.unix;
  