diff --git a/README b/README
index 406a95871a35..44d67eabd75e 100644
--- a/README
+++ b/README
@@ -1,12 +1,14 @@
 *** Building the installation CD ***
 
+(Or just grab an ISO from http://nix.cs.uu.nl/dist/nix/.)
+
 - Make sure that you have a very recent Nix.
 
 - Pull from the Nixpkgs channel to speed up building.
 
 - Check out https://svn.cs.uu.nl:12443/repos/trace/nixos/trunk/.
 
-- make a symbolic link called "pkgs" to the location of Nixpkgs
+- Make a symbolic link called "pkgs" to the location of Nixpkgs.
 
 - Build the ISO image:
 
diff --git a/configuration/rescue-cd.nix b/configuration/rescue-cd.nix
index a8453f1f619b..2fd1f0b9945f 100644
--- a/configuration/rescue-cd.nix
+++ b/configuration/rescue-cd.nix
@@ -85,12 +85,12 @@ rec {
 
 
   # Get a recent copy of Nixpkgs.
-  nixpkgsRel = "nixpkgs-0.11pre7355";
+  nixpkgsRel = "nixpkgs-0.11pre7577";
   nixpkgsURL = http://nix.cs.uu.nl/dist/nix/ + nixpkgsRel;
 
   nixpkgsTarball = pkgs.fetchurl {
     url = nixpkgsURL + "/" + nixpkgsRel + ".tar.bz2";
-    md5 = "9d3e5e9f6ab64536803abf3f2e1c6056";
+    md5 = "0949415aa342679f206fdb7ee9b04b46";
   };