diff --git a/update_chroot b/update_chroot
index f3897c8832..d6d0367a52 100755
--- a/update_chroot
+++ b/update_chroot
@@ -95,7 +95,7 @@ if [ "${FLAGS_skip_toolchain_update}" -eq "${FLAGS_FALSE}" ]; then
     TOOLCHAIN_FLAGS+=( --nousepkg )
   fi
   # Expand the path before sudo, as root doesn't have the same path magic.
-  sudo $(type -p cros_setup_toolchains) "${TOOLCHAIN_FLAGS[@]}"
+  sudo -E $(type -p cros_setup_toolchains) "${TOOLCHAIN_FLAGS[@]}"
 fi
 
 # Build cros_workon packages when they are changed.