fix: add missing versions

pkgs/development/libraries/cppzmq/default.nix

@@ -1,7 +1,7 @@
 { stdenv, fetchgit }:
 
 stdenv.mkDerivation rec {
-  name = "cppzmq";
+  name = "cppzmq-2015-03-05";
 
   src = fetchgit {
     url = "git://github.com/zeromq/cppzmq";

pkgs/development/libraries/nvidia-texture-tools/default.nix

@@ -5,7 +5,7 @@
 stdenv.mkDerivation rec {
   # No support yet for cg, cuda, glew, glut, openexr.
 
-  name = "nvidia-texture-tools";
+  name = "nvidia-texture-tools-1388";
 
   src = fetchsvn {
     url = "http://nvidia-texture-tools.googlecode.com/svn/trunk";

pkgs/development/libraries/xcb-util-cursor/HEAD.nix

@@ -2,7 +2,7 @@
 , git, xlibs, gnum4, libxcb, gperf }:
 
 stdenv.mkDerivation rec {
-  name = "xcb-util-cursor-HEAD";
+  name = "xcb-util-cursor-0.1.1-3-gf03cc27";
 
   src = fetchgit {
     url    = http://anongit.freedesktop.org/git/xcb/util-cursor.git;