anchor.diff:  stdenv.mkDerivation rec {
     pname = "source-highlight";
     version = "3.1.9";
  +
  +  outputs = [ "out" "doc" "dev" ];
   
     src = fetchurl {
       url = "mirror://gnu/src-highlite/${pname}-${version}.tar.gz";
  
positive.code:   # Upstream uses the same intermediate files in multiple tests, running
    # them in parallel by make will eventually break one or more tests.
    enableParallelChecking = false;
  
    outputs = [ "out" "doc" "dev" ];
  
    meta = with lib; {
      description = "Source code renderer with syntax highlighting";
  
negative.code:   strictDeps = true;
    buildInputs = [ boost ];
  
    configureFlags = [
      "--with-boost=${boost.out}"
      "--with-bash-completion=${placeholder "out"}/share/bash_completion.d"
    ];
  
    doCheck = !stdenv.cc.isClang;
  
  