anchor.diff:      python acprep update --no-pch --prefix=$out
     '';
   
  -  doCheck = true;
  +  doCheck = !stdenv.isDarwin;
   
     enableParallelBuilding = true;
   
  
positive.code:       their data, there really is no alternative.
      '';
  
      platforms = stdenv.lib.platforms.linux;
      maintainers = [ stdenv.lib.maintainers.simons ];
    };
  }
  
negative.code:     git texinfo
    ];
  
    CPPFLAGS = "-I${gmp}/include -I${mpfr}/include";
  
    LDFLAGS = "-L${gmp}/lib -L${mpfr}/lib";
  
    buildPhase = ''
      sed -i acprep \
        -e 's|search_prefixes = .*|search_prefixes = ["${boost}"]|'
  