Added domain option. Maybe fixed binary cache signing.

pkgs/pkgsets.nix

@@ -37,7 +37,7 @@ let
     nix-update-source
     nix-zsh-completions
     nixbang
-    nixops
+#    nixops
     nmap
     nox
     ntfs3g
@@ -58,7 +58,7 @@ let
     unzipNLS
     usbutils
     vim
-#    vulnix
+    vulnix
     wget
     whois
     wirelesstools
@@ -250,7 +250,7 @@ let
   ];
 
 in {
- environment.systemPackages =  base
+  environment.systemPackages =  base
                             ++ (optPkgs dict "dict")
                             ++ (optPkgs [emacs] "emacs")
                             ++ (optPkgs extra "extra")