fix my dir spelling mistake

svn path=/nixpkgs/trunk/; revision=13556

pkgs/development/libraries/goocanvas/default.nix

@@ -0,0 +1,17 @@
+args:
+args.stdenv.mkDerivation {
+  name = "goocanvas-0.10";
+
+  src = args.fetchurl {
+    url = mirror://sourceforge/goocanvas/goocanvas-0.10.tar.gz;
+    sha256 = "0b49szbr3n7vpavly9w17ipa8q3ydicdcd177vxbdvbsnvg7aqp9";
+  };
+
+  buildInputs =(with args; [gtk cairo glib pkgconfig]);
+
+  meta = { 
+      description = "canvas widget for GTK+ using the cairo 2D library";
+      homepage = http://goocanvas.sourceforge.net/;
+      license = ["GPL" "LGPL"];
+  };
+}