anchor.diff:  
       let php7 = lib.versionAtLeast version "7.0"; in
   
  -    composableDerivation.composableDerivation {} (fixed: {
  +    composableDerivation.composableDerivation {} (fixed: rec {
   
         inherit version;
   
  
positive.code:       '';
  
        src = fetchurl {
          url = "http://www.php.net/distributions/php-${version}.tar.bz2";
          inherit sha256;
        };
  
        meta = with stdenv.lib; {
  
negative.code:       patches = if !php7 then [ ./fix-paths.patch ] else [ ./fix-paths-php7.patch ];
  
      });
  in {
  
    php70 = generic {
      version = "7.0.5";
      sha256 = "c41f1a03c24119c0dd9b741cdb67880486e64349fc33527767f6dc28d3803abb";
    };
  
  }
  