args: with args; stdenv.mkDerivation { inherit version; name = "openexr-${version}"; src = fetchurl { url = "http://download.savannah.nongnu.org/releases/openexr/openexr-${version}.tar.gz"; sha256 = if (version == "1.6.1") then "0l2rdbx9lg4qk2ms98hwbsnzpggdrx3pbjl6pcvrrpjqp5m905n6" else if (version == "1.4.0") then "1y3dxakpg9651dgbj2xp6r4044b5gi74g23w3sr5cs6xi7cywv7m" else abort "not supported version"; }; buildInputs = [pkgconfig zlib] ++ (lib.optional (args ? ctl) (args.ctl)); propagatedBuildInputs = [pkgconfig zlib ilmbase]; configureFlags = "--enable-shared --disable-static --enable-imfexamples"; }