diff --git a/pkgs/development/libraries/glibc-2.12/common.nix b/pkgs/development/libraries/glibc-2.12/common.nix
index 2efe56bb2146..2836267bc107 100644
--- a/pkgs/development/libraries/glibc-2.12/common.nix
+++ b/pkgs/development/libraries/glibc-2.12/common.nix
@@ -5,13 +5,14 @@ cross :
 
 { name, fetchurl, stdenv, installLocales ? false
 , gccCross ? null, kernelHeaders ? null
-, machHeaders ? null, hurdHeaders ? null, mig ? null, fetchgit ? null
+, machHeaders ? null, hurdHeaders ? null, hurdLibpthreadHeaders ? null
+, mig ? null, fetchgit ? null
 , profilingLibraries ? false, meta
 , preConfigure ? "", ... }@args :
 
 let
   # For GNU/Hurd, see below.
-  version = if hurdHeaders != null then "20110623" else "2.12.2";
+  version = if hurdHeaders != null then "20111025" else "2.12.2";
 
   needsPortsNative = stdenv.isMips || stdenv.isArm;
   needsPortsCross = cross.arch == "mips" || cross.arch == "arm";
@@ -31,6 +32,7 @@ assert (cross != null) -> (gccCross != null);
 
 assert (mig != null) -> (machHeaders != null);
 assert (machHeaders != null) -> (hurdHeaders != null);
+assert (hurdHeaders != null) -> (hurdLibpthreadHeaders != null);
 assert (hurdHeaders != null) -> (fetchgit != null);
 
 stdenv.mkDerivation ({
@@ -141,8 +143,8 @@ stdenv.mkDerivation ({
       # maintained by the Hurd folks, `tschwinge/Roger_Whittaker' branch.
       # See <http://www.gnu.org/software/hurd/source_repositories/glibc.html>.
       url = "git://git.sv.gnu.org/hurd/glibc.git";
-      sha256 = "39ea53f318376cbd33e06ec23f4a393fc0801ea3aa87286b30943aa7ef7604cd";
-      rev = "77a94de8d3490e73a71efc0b981356d5acb7a28a";
+      sha256 = "3fb3dd7030a4b6d3e144fa94c32a0c4f46f17f94e2dfbc6bef41cfc3198725ca";
+      rev = "d740cf9d201dc9ecb0335b0a585828dea9cce793";
     }
     else fetchurl {
       url = "mirror://gnu/glibc/glibc-${version}.tar.bz2";
@@ -198,11 +200,15 @@ stdenv.mkDerivation ({
  then {
    # Work around the fact that the configure snippet that looks for
    # <hurd/version.h> does not honor `--with-headers=$sysheaders' and that
-   # glibc expects both Mach and Hurd headers to be in the same place.
-   CPATH = "${hurdHeaders}/include:${machHeaders}/include";
+   # glibc expects Mach, Hurd, and pthread headers to be in the same place.
+   CPATH = "${hurdHeaders}/include:${machHeaders}/include:${hurdLibpthreadHeaders}/include";
 
    # `fetchgit' is a function and thus should not be passed to the
    # `derivation' primitive.
    fetchgit = null;
+
+   # Install NSS stuff in the right place.
+   # XXX: This will be needed for all new glibcs and isn't Hurd-specific.
+   makeFlags = ''vardbdir="$out/var/db"'';
  }
  else { }))
diff --git a/pkgs/development/libraries/glibc-2.12/default.nix b/pkgs/development/libraries/glibc-2.12/default.nix
index 31a8ef13a4fe..251caaede6d3 100644
--- a/pkgs/development/libraries/glibc-2.12/default.nix
+++ b/pkgs/development/libraries/glibc-2.12/default.nix
@@ -1,5 +1,6 @@
 { stdenv, fetchurl, kernelHeaders
-, machHeaders ? null, hurdHeaders ? null, mig ? null, fetchgit ? null
+, machHeaders ? null, hurdHeaders ? null, hurdLibpthreadHeaders ? null
+, mig ? null, fetchgit ? null
 , installLocales ? true
 , profilingLibraries ? false
 , gccCross ? null
@@ -40,9 +41,9 @@ in
 
   (if hurdHeaders != null
    then rec {
-     inherit machHeaders hurdHeaders mig fetchgit;
+     inherit machHeaders hurdHeaders hurdLibpthreadHeaders mig fetchgit;
 
-     propagatedBuildInputs = [ machHeaders hurdHeaders ];
+     propagatedBuildInputs = [ machHeaders hurdHeaders hurdLibpthreadHeaders ];
 
      passthru = {
        # When building GCC itself `propagatedBuildInputs' above is not
diff --git a/pkgs/os-specific/gnu/libpthread/default.nix b/pkgs/os-specific/gnu/libpthread/default.nix
index 6f978b0c76de..08838f17affc 100644
--- a/pkgs/os-specific/gnu/libpthread/default.nix
+++ b/pkgs/os-specific/gnu/libpthread/default.nix
@@ -1,27 +1,29 @@
 { fetchgit, stdenv, autoconf, automake, libtool
-, machHeaders, hurdHeaders, hurd
+, machHeaders, hurdHeaders, hurd, headersOnly ? false
 , cross ? null, gccCross ? null, glibcCross ? null }:
 
 assert (cross != null) -> (gccCross != null) && (glibcCross != null);
+assert (!headersOnly) -> (hurd != null);
 
 let
-  date = "20100512";
+  date = "20111020";
 
   # Use the `tschwinge/Peter_Herbolzheimer' branch as prescribed in
   # <http://www.gnu.org/software/hurd/hurd/building/cross-compiling.html>.
-  rev = "c4bb52770f0b6703bef76c5abdd08663b46b4dc9";
+  rev = "a7b82c3302bf9c47176648eb802a61ae2d9a16f5";
 in
 stdenv.mkDerivation ({
-  name = "libpthread-hurd-${date}";
+  name = "libpthread-hurd-${if headersOnly then "headers-" else ""}${date}";
 
   src = fetchgit {
     url = "git://git.sv.gnu.org/hurd/libpthread.git";
-    sha256 = "1wya9kfmqgn04l995a25p4hxfwddjahfmhdzljb4cribw0bqdizg";
+    sha256 = "e8300762914d927c0da4168341a5982a1057613e1af363ee68942087b2570b3d";
     inherit rev;
   };
 
   buildNativeInputs = [ autoconf automake libtool ];
-  buildInputs = [ machHeaders hurdHeaders hurd ]
+  buildInputs = [ machHeaders hurdHeaders ]
+   ++ stdenv.lib.optional (!headersOnly) hurd
    ++ stdenv.lib.optional (gccCross != null) gccCross;
 
   preConfigure = "autoreconf -vfi";
@@ -37,6 +39,20 @@ stdenv.mkDerivation ({
 
 //
 
+(if headersOnly
+ then {
+   configureFlags =
+     [ "--build=i586-pc-gnu"
+       "ac_cv_lib_ihash_hurd_ihash_create=yes"
+     ];
+
+   buildPhase = ":";
+   installPhase = "make install-data-local-headers";
+ }
+ else { })
+
+//
+
 (if cross != null
  then {
    crossConfig = cross.config;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 190c25230bbb..1d522b505e05 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3433,7 +3433,9 @@ let
      //
 
      (if crossGNU
-      then { inherit machHeaders hurdHeaders mig fetchgit; }
+      then {
+        inherit machHeaders hurdHeaders hurdLibpthreadHeaders mig fetchgit;
+      }
       else { }))));
 
   glibcCross = glibc212Cross;
@@ -5221,6 +5223,11 @@ let
     hurdPartedCross = null;
   };
 
+  hurdLibpthreadHeaders = callPackage ../os-specific/gnu/libpthread {
+    headersOnly = true;
+    hurd = null;
+  };
+
   hurdLibpthreadCross = forceBuildDrv(import ../os-specific/gnu/libpthread {
     inherit fetchgit stdenv autoconf automake libtool
       machHeaders hurdHeaders glibcCross;