anchor.diff: -{ stdenv, fetchFromGitHub, autoreconfHook
  +{ stdenv, fetchFromGitHub, fetchpatch, autoreconfHook
   , coreutils, gnugrep, gnused, lm_sensors, net_snmp, openssh, openssl, perl
  +, mysql, zlib
   , runtimeShell }:
   
   with stdenv.lib;
  
positive.code:     sha256 = "1pw7i6d2cnb5nxi2lbkwps2qzz04j9zd86fzpv9ka896b4aqrwv1";
    };
  
    # !!! Awful hack. Grrr... this of course only works on NixOS.
    # Anyway the check that configure performs to figure out the ping
    # syntax is totally impure, because it runs an actual ping to
  
negative.code:   '';
  
    # !!! make openssh a runtime dependency only
    buildInputs = [ mysql net_snmp openssh openssl perl zlib ];
  
    nativeBuildInputs = [ autoreconfHook ];
  
  