{ stdenv, fetchurl, zlib }: assert zlib != null; stdenv.mkDerivation rec { name = "libpng-1.5.15"; src = fetchurl { url = "mirror://sourceforge/libpng/${name}.tar.xz"; sha256 = "1iaplghmv5qhd4dgwfymhp42sh27vz6s2107jk698xm57z2v9hwm"; }; propagatedBuildInputs = [ zlib ]; doCheck = true; passthru = { inherit zlib; }; meta = { description = "The official reference implementation for the PNG file format"; homepage = http://www.libpng.org/pub/png/libpng.html; license = "free-non-copyleft"; # http://www.libpng.org/pub/png/src/libpng-LICENSE.txt }; }