diff --git a/build b/build
index 58e3071..abcea21 100755
--- a/build
+++ b/build
@@ -102,7 +102,7 @@ if "$configure"; then
   for p in $(find "${root_dir}/buildroot_patches/" -maxdepth 1 -name '*.patch' -print); do
     patch -N -r - -p 1 <"$p" || :
   done
-  make O="$out_dir" BR2_EXTERNAL="${root_dir}/kernel_module:${root_dir}/gem5:${root_dir}/parsec-benchmark" "$defconfig"
+  make O="$out_dir" BR2_EXTERNAL="../kernel_module:../gem5:../parsec-benchmark" "$defconfig"
   # TODO Can't get rid of these for now.
   # http://stackoverflow.com/questions/44078245/is-it-possible-to-use-config-fragments-with-buildroots-config
   for config_fragment in $config_fragments; do
@@ -115,9 +115,9 @@ BR2_ROOTFS_POST_SCRIPT_ARGS=\"$post_script_args\"
   if "$gem5"; then
     printf "BR2_PACKAGE_GEM5=y\n" >> "${config_file}"
     if [ -z "$linux_kernel_custom_config_file" ] && [ ! "$arch" = aarch64 ]; then
-      f="kernel_config_${arch_dir}"
+      f="../kernel_config_${arch_dir}"
       if [ -f "$f" ]; then
-        printf "BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE=\"../$f\"\n" >> "${config_file}"
+        printf "BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE=\"$f\"\n" >> "${config_file}"
       fi
     fi
   fi