nixpkgs/pkgs/development/libraries/libpng/default.nix

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{stdenv, fetchurl, zlib}:
assert zlib != null;
stdenv.mkDerivation rec {
name = "libpng-1.2.40";
src = fetchurl {
url = "mirror://sourceforge/libpng/${name}.tar.gz";
md5 = "a2f6808735bf404967f81519a967fb2a";
};
propagatedBuildInputs = [zlib];
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
};
}