diff --git a/README b/README
index 4175c303360..b9304886b7d 100644
--- a/README
+++ b/README
@@ -131,8 +131,9 @@ To get out of maintenance mode:
 
 - Testing the installer:
 
+  $ nix-build configuration/rescue-cd.nix -A system.nixosInstaller
   $ dd if=/dev/zero of=diskimage seek=2G count=0 bs=1
   $ yes | mke2fs -j diskimage
   $ mount -o loop diskimage /mnt
-  $ nixos-installer /mnt /etc/nixos/nixos/ /etc/nixos/configuration.nix
+  $ ./result/bin/nixos-installer /mnt /etc/nixos/nixos/ /etc/nixos/configuration.nix
 
diff --git a/configuration/rescue-cd.nix b/configuration/rescue-cd.nix
index e580343baad..27a906716a8 100644
--- a/configuration/rescue-cd.nix
+++ b/configuration/rescue-cd.nix
@@ -1,7 +1,7 @@
 rec {
 
   
-  nixpkgsRel = "nixpkgs-0.11pre7785";
+  nixpkgsRel = "nixpkgs-0.11pre7834";
 
 
   configuration = {
@@ -106,7 +106,7 @@ rec {
   # Get a recent copy of Nixpkgs.
   nixpkgsTarball = pkgs.fetchurl {
     url = configuration.installer.nixpkgsURL + "/" + nixpkgsRel + ".tar.bz2";
-    md5 = "0f554f092d94cc2cb7fe1e5c09f26adc";
+    md5 = "844df61d5a1d02ca7de7af691a6279b5";
   };