cairo: minor bugfix update, depend on new pixman now

pkgs/development/libraries/cairo/default.nix

@@ -12,11 +12,11 @@ assert postscriptSupport -> zlib != null;
 assert pngSupport -> libpng != null;
 
 stdenv.mkDerivation rec {
-  name = "cairo-1.12.10";
+  name = "cairo-1.12.12";
 
   src = fetchurl {
     url = "http://cairographics.org/releases/${name}.tar.xz";
-    sha256 = "0fxh6i8bv6rvj6lxyss3p4ns6irvmdkgnx98yjfalv0g47piln7i";
+    sha256 = "06nq0pzk2hyknp8cy1xn12s7i18sfcs0r3xfalilg1yckrsr7xhl";
   };
 
   buildInputs = with xlibs;

pkgs/development/libraries/pixman/default.nix

@@ -0,0 +1,18 @@
+{ fetchurl, stdenv, pkgconfig, perl }:
+
+stdenv.mkDerivation rec {
+  name = "pixman-0.28.2";
+
+  src = fetchurl {
+    url = "http://cairographics.org/releases/${name}.tar.gz";
+    sha256 = "0mcvxd5gx3w1wzgph91l2vaiic91jmx7s01hi2igphyvd80ckyia";
+  };
+
+  buildInputs = [ pkgconfig perl ];
+
+  meta = {
+    homepage = http://pixman.org;
+    description = "A low-level library for pixel manipulation";
+    license = "MIT";
+  };
+}