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

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{ stdenv, fetchurl, zlib }:
assert zlib != null;
stdenv.mkDerivation rec {
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name = "libpng-1.5.13";
src = fetchurl {
url = "mirror://sourceforge/libpng/${name}.tar.xz";
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sha256 = "1vks4mqv4140b10kp53qrywsx9m4xan5ibwsrlmf42ni075zjhxq";
};
propagatedBuildInputs = [ zlib ];
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
};
}