diff --git a/build b/build
index 986158a..1117234 100755
--- a/build
+++ b/build
@@ -139,7 +139,8 @@ BR2_ROOTFS_POST_SCRIPT_ARGS=\"$post_script_args\"
       exit 1
     fi
   else
-    printf "BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES=\"../kernel_config_fragment\"\n" >> "${config_file}"
+    f=../kernel_config_fragment
+    printf "BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES=\"${f}\"\n" >> "${config_file}"
     if "${linux_reconfigure}"; then
       # https://stackoverflow.com/questions/49260466/why-when-i-change-br2-linux-kernel-custom-config-file-and-run-make-linux-reconfi
       touch "$f"