anchor.diff:  
   stdenv.mkDerivation rec {
     name = "pangomm-${version}";
  -  versionMajor = "2.38";
  -  versionMinor = "1";
  +  versionMajor = "2.40";
  +  versionMinor = "0";
     version = "${versionMajor}.${versionMinor}";
   
     src = fetchurl {
       url = "mirror://gnome/sources/pangomm/${versionMajor}/${name}.tar.xz";
  -    sha256 = "12xwjvqfxhqblcv7641k0l6r8n3qifnrx8w9571izn1nbd81iyzg";
  +    sha256 = "7dd0afa9dcce57cdb0aad77da9ea46823ee8515d5f3ffd895b9ede7365c3d70d";
     };
   
     buildInputs = [
  -    cairo
       cairomm
       glibmm
       libpng
  
positive.code:   ];
  
    configureFlags = [
      "--disable-deprecated-api"
      "--disable-documentation"
      "--without-libstdc-doc"
      "--without-libsigc-doc"
      "--without-glibmm-doc"
  
negative.code: { stdenv
  , fetchurl
  
  , cairomm
  , glibmm
  , libpng
  