{stdenv, fetchurl, zlib}: assert !isNull zlib; derivation { name = "libpng-1.2.5"; system = stdenv.system; builder = ./builder.sh; src = fetchurl { url = http://heanet.dl.sourceforge.net/sourceforge/png-mng/libpng-1.2.5.tar.bz2; md5 = "3fc28af730f12ace49b14568de4ad934"; }; stdenv = stdenv; zlib = zlib; }