anchor.diff:      tar xf ${texmfSrc} -C $out/share --strip-components=1
       tar xf ${langTexmfSrc} -C $out/share --strip-components=1
   
  -    sed -e s@/usr/bin/g@@ -i $(grep /usr/bin/ -rl . )
  +    sed -e s@/usr/bin/@@g -i $(grep /usr/bin/ -rl . )
   
  -    sed -e 's@^#! ?env ruby@#! ${ruby}/bin/ruby@' -i $(grep 'env ruby' -rl . )
  -    sed -e 's@^#! ?env perl@#! ${perl}/bin/perl@' -i $(grep 'env perl' -rl . )
  -    sed -e 's@^#! ?env python@#! ${python}/bin/perl@' -i $(grep 'env python' -rl . )
  +    sed -e 's@\<env ruby@${ruby}/bin/ruby@' -i $(grep 'env ruby' -rl . )
  +    sed -e 's@\<env perl@${perl}/bin/perl@' -i $(grep 'env perl' -rl . )
  +    sed -e 's@\<env python@${python}/bin/python@' -i $(grep 'env python' -rl . )
   
       sed -e '/ubidi_open/i#include <unicode/urename.h>' -i $(find . -name configure)
       sed -e s@ncurses/curses.h@curses.h@g -i $(grep ncurses/curses.h -rl . ) 
  
positive.code:     platforms = args.lib.platforms.linux ++ args.lib.platforms.freebsd ;
    };
  }
  
  
negative.code:     zlib bzip2 ncurses libpng flex bison libX11 libICE
      xproto freetype t1lib gd libXaw icu ghostscript ed 
      libXt libXpm libXmu libXext xextproto perl libSM 
      ruby expat curl libjpeg python fontconfig
    ];
  
    configureFlags = [ "--with-x11" 
  