diff --git a/pkgs/build-support/gcc-wrapper/default.nix b/pkgs/build-support/gcc-wrapper/default.nix
index 87617621e64..992c0f9af37 100644
--- a/pkgs/build-support/gcc-wrapper/default.nix
+++ b/pkgs/build-support/gcc-wrapper/default.nix
@@ -57,7 +57,7 @@ stdenv.mkDerivation {
 
   crossAttrs = {
     shell = shell.crossDrv + shell.crossDrv.shellPath;
-    libc = libc.crossDrv;
+    libc = stdenv.gccCross.libc;
     coreutils = coreutils.crossDrv;
     binutils = binutils.crossDrv;
     gcc = gcc.crossDrv;
diff --git a/pkgs/development/compilers/gcc/4.6/default.nix b/pkgs/development/compilers/gcc/4.6/default.nix
index d95e161ba23..6713dd12b3c 100644
--- a/pkgs/development/compilers/gcc/4.6/default.nix
+++ b/pkgs/development/compilers/gcc/4.6/default.nix
@@ -333,6 +333,7 @@ stdenv.mkDerivation ({
 
   crossAttrs = {
     patches = patches ++ [ ./hurd-sigrtmin.patch ];
+    postPatch = "";
     AR = "${stdenv.cross.config}-ar";
     LD = "${stdenv.cross.config}-ld";
     CC = "${stdenv.cross.config}-gcc";