nixpkgs/pkgs/tools/graphics/optipng/default.nix

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{ stdenv, fetchurl }:
# This package comes with its own copy of zlib, libpng and pngxtern
stdenv.mkDerivation rec {
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name = "optipng-0.7.4";
src = fetchurl {
url = "mirror://sourceforge/optipng/${name}.tar.gz";
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sha256 = "1zrphbz17rhhfl1l95q5s979rrhifbwczl2xj1fdrnq5jid5s2sj";
};
meta = {
homepage = http://optipng.sourceforge.net/;
description = "A PNG optimizer";
license = "bsd";
};
}