* The activation script can't use /bin/sh as its interpreter because

it creates the /bin/sh symlink, which may not exist yet (esp. when
  booting from CD).

svn path=/nixos/branches/modular-nixos/; revision=15875

modules/system/activation/activation-script.nix

@@ -205,7 +205,7 @@ in
               activateLibNames = attrNames activateLib;
           in {
           script = pkgs.writeScript "nixos-activation-script"
-            ("#!/bin/sh\n"
+            ("#! ${pkgs.stdenv.shell}\n"
              + textClosureMap id activateLib activateLibNames + "\n"
                # make sure that the activate snippet is added last.
              + withHeadlines.activate.text);