anchor.diff:      sed -i \
           -e 's|\(COMMAND\) \([^ ]\+\) \([^ ]\+\) \(.*\)|\1 \2 \3 -c \4|' \
           cmake_extras/CustomPCH.cmake
  -#    sed -i \
  -#        -e 's|\(COMMAND\) \([^ ]\+\) \([^ ]\+\) \(.*\)|\1 \2 \3 -x c++-header \4|' \
  -#        cmake_extras/CustomPCH.cmake
       cd ../build
       cmake -G "Unix Makefiles" \
           -DCMAKE_INSTALL_PREFIX=$out \
           -DCMAKE_BUILD_TYPE=Release \
           -DCMAKE_SKIP_BUILD_RPATH=ON \
           ../src
  -    #make VERBOSE=1
       make
       make install
     '';
  
positive.code:     description = "Free, open source, multi-platform ebook (ePub) editor";
      homepage = https://code.google.com/p/sigil/;
      license = stdenv.lib.licenses.gpl3;
    };
  }
  
negative.code: }:
  
  let
    version = "0.7.4";
  
  in
  
  stdenv.mkDerivation rec {
    name = "sigil-${version}";
  
    src = fetchurl {
      url = "https://sigil.googlecode.com/files/Sigil-${version}-Code.zip";
      sha256 = "68c7ca15ea8611921af0c435369563f55c6afd2ef1fb0945cf6c4a47429b0fb5";
    };
  
  