diff --git a/pkgs/misc/nix-unstable/default.nix b/pkgs/misc/nix-unstable/default.nix
index d678d925d432..608a7638d131 100644
--- a/pkgs/misc/nix-unstable/default.nix
+++ b/pkgs/misc/nix-unstable/default.nix
@@ -20,5 +20,5 @@ stdenv.mkDerivation {
   # uncomment if you want to be able to use nix-prefetch-url when NIX_ROOT
   # is set
   #patches = [./nix-0.10pre5679.patch];
-  patches = [./nix-0.10pre5896-date.patch];
+  patches = [./nix-0.10pre5896-date.patch ./nix-0.10pre5896-paths.patch ./nix-0.10pre5896-chroot-once.patch];
 }
diff --git a/pkgs/misc/nix-unstable/nix-0.10pre5896-chroot-once.patch b/pkgs/misc/nix-unstable/nix-0.10pre5896-chroot-once.patch
new file mode 100644
index 000000000000..3ff525ec97cd
--- /dev/null
+++ b/pkgs/misc/nix-unstable/nix-0.10pre5896-chroot-once.patch
@@ -0,0 +1,28 @@
+diff -rc nix-0.10pre5896/scripts/download-using-manifests.pl.in nix-0.10pre5896.new/scripts/download-using-manifests.pl.in
+*** nix-0.10pre5896/scripts/download-using-manifests.pl.in	2006-07-24 20:39:47.000000000 +0200
+--- nix-0.10pre5896.new/scripts/download-using-manifests.pl.in	2006-08-02 21:45:53.000000000 +0200
+***************
+*** 9,14 ****
+--- 9,15 ----
+  
+  open LOGFILE, ">>$logFile" or die "cannot open log file $logFile";
+  
++ delete $ENV{"NIX_ROOT"};
+  
+  # Create a temporary directory.
+  my $tmpDir;
+diff -rc nix-0.10pre5896/scripts/nix-prefetch-url.in nix-0.10pre5896.new/scripts/nix-prefetch-url.in
+*** nix-0.10pre5896/scripts/nix-prefetch-url.in	2006-07-24 20:39:47.000000000 +0200
+--- nix-0.10pre5896.new/scripts/nix-prefetch-url.in	2006-08-02 21:13:46.000000000 +0200
+***************
+*** 3,8 ****
+--- 3,11 ----
+  url=$1
+  expHash=$2
+  
++ # to prevent doing more than 1 chroot
++ unset NIX_ROOT
++ 
+  hashType=$NIX_HASH_ALGO
+  if test -z "$hashType"; then
+      hashType=md5
diff --git a/pkgs/misc/nix-unstable/nix-0.10pre5896-paths.patch b/pkgs/misc/nix-unstable/nix-0.10pre5896-paths.patch
new file mode 100644
index 000000000000..430620c0039c
--- /dev/null
+++ b/pkgs/misc/nix-unstable/nix-0.10pre5896-paths.patch
@@ -0,0 +1,14 @@
+diff -rc nix-0.10pre5896/scripts/nix-prefetch-url.in nix-0.10pre5896.new/scripts/nix-prefetch-url.in
+*** nix-0.10pre5896/scripts/nix-prefetch-url.in	2006-07-24 20:39:47.000000000 +0200
+--- nix-0.10pre5896.new/scripts/nix-prefetch-url.in	2006-08-02 20:01:15.000000000 +0200
+***************
+*** 3,8 ****
+--- 3,10 ----
+  url=$1
+  expHash=$2
+  
++ export PATH=$PATH:@coreutils@
++ 
+  hashType=$NIX_HASH_ALGO
+  if test -z "$hashType"; then
+      hashType=md5