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