diff --git a/pkgs/build-support/gcc-wrapper-new/builder.sh b/pkgs/build-support/gcc-wrapper-new/builder.sh
index b68f241728ca..1a23294dd743 100644
--- a/pkgs/build-support/gcc-wrapper-new/builder.sh
+++ b/pkgs/build-support/gcc-wrapper-new/builder.sh
@@ -9,6 +9,10 @@ if test -z "$nativeLibc"; then
     dynamicLinker="$libc/lib/$dynamicLinker"
     echo $dynamicLinker > $out/nix-support/dynamic-linker
 
+    if test -e $libc/lib/32/ld-linux.so.2; then
+        echo $libc/lib/32/ld-linux.so.2 > $out/nix-support/dynamic-linker-m32
+    fi
+
     # The "-B$libc/lib/" flag is a quick hack to force gcc to link
     # against the crt1.o from our own glibc, rather than the one in
     # /usr/lib.  (This is only an issue when using an `impure'
diff --git a/pkgs/build-support/gcc-wrapper-new/gcc-wrapper.sh b/pkgs/build-support/gcc-wrapper-new/gcc-wrapper.sh
index a76684806b88..8a49fcb9b06e 100644
--- a/pkgs/build-support/gcc-wrapper-new/gcc-wrapper.sh
+++ b/pkgs/build-support/gcc-wrapper-new/gcc-wrapper.sh
@@ -32,6 +32,10 @@ for i in "$@"; do
         dontLink=1
     elif test "${i:0:1}" != "-"; then
         nonFlagArgs=1
+    elif test "$i" = "-m32"; then
+        if test -e @out@/nix-support/dynamic-linker-m32; then
+            NIX_LDFLAGS="$NIX_LDFLAGS -dynamic-linker $(cat @out@/nix-support/dynamic-linker-m32)"
+        fi
     fi
 done
 
diff --git a/pkgs/tools/misc/grub/default.nix b/pkgs/tools/misc/grub/default.nix
index 44c2c02b0200..398b57e623eb 100644
--- a/pkgs/tools/misc/grub/default.nix
+++ b/pkgs/tools/misc/grub/default.nix
@@ -1,9 +1,5 @@
 {stdenv, fetchurl, autoconf, automake}:
 
-if stdenv.system == "x86_64-linux" then
-  abort "Grub doesn't build on x86_64-linux.  You should use the build for i686-linux instead."
-else
-
 stdenv.mkDerivation {
   name = "grub-0.97-patch-1.7";
   
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ae1973cf57b6..1647af51b540 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -267,6 +267,15 @@ let pkgs = rec {
         }
       else defaultStdenv;
 
+  # A stdenv capable of building 32-bit binaries.  On x86_64-linux,
+  # it uses GCC compiled with multilib support; on i686-linux, it's
+  # just the plain stdenv.
+  stdenv_32bit =
+    if system == "x86_64-linux" then
+      overrideGCC stdenv gcc43multi
+    else
+      stdenv;
+
 
   ### BUILD SUPPORT
 
@@ -677,19 +686,16 @@ let pkgs = rec {
     inherit fetchurl stdenv;
   };
 
-  grub =
-    if system == "x86_64-linux" then
-      (import ./all-packages.nix {system = "i686-linux";}).grub
-    else
-      import ../tools/misc/grub {
-        inherit fetchurl stdenv autoconf automake;
-      };
+  grub = import ../tools/misc/grub {
+    inherit fetchurl autoconf automake;
+    stdenv = stdenv_32bit;
+  };
 
   gssdp = import ../development/libraries/gssdp {
-      inherit fetchurl stdenv pkgconfig libxml2;
-      inherit (gtkLibs) glib;
-      inherit (gnome) libsoup;
-    };
+    inherit fetchurl stdenv pkgconfig libxml2;
+    inherit (gtkLibs) glib;
+    inherit (gnome) libsoup;
+  };
 
   gtkgnutella = import ../tools/networking/p2p/gtk-gnutella {
     inherit fetchurl stdenv pkgconfig libxml2;
@@ -697,15 +703,15 @@ let pkgs = rec {
   };
 
   gupnp = import ../development/libraries/gupnp {
-      inherit fetchurl stdenv pkgconfig libxml2 gssdp e2fsprogs;
-      inherit (gtkLibs) glib;
-      inherit (gnome) libsoup;
-    };
+    inherit fetchurl stdenv pkgconfig libxml2 gssdp e2fsprogs;
+    inherit (gtkLibs) glib;
+    inherit (gnome) libsoup;
+  };
 
   gupnptools = import ../tools/networking/gupnp-tools {
-      inherit fetchurl stdenv gssdp gupnp pkgconfig libxml2 e2fsprogs;
-      inherit (gtkLibs) gtk glib;
-      inherit (gnome) libsoup libglade gnomeicontheme;
+    inherit fetchurl stdenv gssdp gupnp pkgconfig libxml2 e2fsprogs;
+    inherit (gtkLibs) gtk glib;
+    inherit (gnome) libsoup libglade gnomeicontheme;
   };
 
   gzip = useFromStdenv "gzip"
@@ -2346,7 +2352,8 @@ let pkgs = rec {
   });
 
   aterm242fixes = import ../development/libraries/aterm/2.4.2-fixes.nix {
-    inherit fetchurl stdenv;
+    inherit fetchurl;
+    stdenv = overrideGCC stdenv gcc43multi;
   };
 
   aterm23x = import ../development/libraries/aterm/2.3.nix {
diff --git a/pkgs/top-level/build-for-release.nix b/pkgs/top-level/build-for-release.nix
index 6ace81c9b146..f0dfa744304e 100644
--- a/pkgs/top-level/build-for-release.nix
+++ b/pkgs/top-level/build-for-release.nix
@@ -54,6 +54,7 @@ let
       gawk
       gcc
       gcc34
+      gcc43
       gdb
       ghc
       ghostscript
@@ -66,6 +67,7 @@ let
       gnutar
       gqview
       graphviz
+      grub
       gzip
       hal
       hello
@@ -209,7 +211,6 @@ let
       batik
       ecj
       eclipsesdk
-      grub
       jakartaregexp
       jdkPlugin
       jetty
@@ -243,6 +244,7 @@ let
       emacs
       firefox
       gcc
+      gcc43multi
       hello
       libtool
       nixUnstable