anchor.diff: -{ stdenv, fetchurl, perl, icmake }:
  +{ stdenv, fetchurl, perl, icmake, utillinux }:
   
   stdenv.mkDerivation rec {
     name = "yodl-${version}";
  
positive.code:   '';
  
    installPhase = ''
      ./build install programs $out
      ./build install macros $out
      ./build install man $out
    '';
  
    meta = with stdenv.lib; {
  
negative.code: 
    preConfigure = ''
      patchShebangs scripts/.
      substituteInPlace INSTALL.im --replace /usr $out
      patchShebangs ./build
      substituteInPlace macros/rawmacros/startdoc.pl --replace /usr/bin/perl ${perl}/bin/perl
      substituteInPlace scripts/yodl2whatever.in --replace getopt ${utillinux}/bin/getopt
    '';
  
    buildPhase = ''
  