diff --git a/pkgs/development/compilers/gcc-4.4/builder.sh b/pkgs/development/compilers/gcc-4.4/builder.sh
index 2bc011e3e6e..d40b9de2f7d 100644
--- a/pkgs/development/compilers/gcc-4.4/builder.sh
+++ b/pkgs/development/compilers/gcc-4.4/builder.sh
@@ -23,14 +23,24 @@ if test "$noSysDirs" = "1"; then
         # that does not include Glibc's limits.h (notably missing
         # SSIZE_MAX, which breaks the build).
         export NIX_FIXINC_DUMMY=$(cat $NIX_GCC/nix-support/orig-libc)/include
+
+	# The path to the Glibc binaries such as `crti.o'.
+	glibc_libdir="$(cat $NIX_GCC/nix-support/orig-libc)/lib"
         
     else
         # Hack: support impure environments.
         extraCFlags="-isystem /usr/include"
         extraLDFlags="-L/usr/lib64 -L/usr/lib"
+	glibc_libdir="/usr/lib"
         export NIX_FIXINC_DUMMY=/usr/include
     fi
 
+    # Setting $C_INCLUDE_PATH helps `xgcc' find the C library headers.
+    export C_INCLUDE_PATH="$NIX_FIXINC_DUMMY"
+
+    # Likewise, to help it find `crti.o' and similar files.
+    export LIBRARY_PATH="$glibc_libdir"
+
     extraCFlags="-g0 -I$gmp/include -I$mpfr/include $extraCFlags"
     extraLDFlags="--strip-debug $extraLDFlags"