* Make sure that /nix/var/nix/channel-cache exists.

svn path=/nixos/trunk/; revision=9854

installer/nixos-rebuild.sh

@@ -34,6 +34,7 @@ if test -z "$NIXOS_NO_PULL"; then
     manifests=$(nix-instantiate --eval-only --xml --strict $NIXOS -A manifests \
         | grep '<string'  | sed 's^.*"\(.*\)".*^\1^g')
 
+    mkdir -p /nix/var/nix/channel-cache
     for i in $manifests; do
         NIX_DOWNLOAD_CACHE=/nix/var/nix/channel-cache nix-pull $i || true
     done