diff --git a/config/functions b/config/functions
index 552488d5e2..e9dcdcd0f0 100644
--- a/config/functions
+++ b/config/functions
@@ -851,10 +851,10 @@ calculate_stamp() {
   [ -n "$DEVICE" ] && stamp+=" $PROJECT_DIR/$PROJECT/devices/$DEVICE/patches/$PKG_NAME"
   [ -n "$PKG_NEED_UNPACK" ] && stamp+=" $PKG_NEED_UNPACK"
 
-  data="$(find ${stamp} -exec sha256sum {} \; 2>/dev/null | sed "s/ ${ROOT//\//\\/}\// /")"
+  data="$(find -L ${stamp} -type f -not -name '.*' 2>/dev/null | sed "s|^${ROOT}/||" | LC_ALL=C sort -u | xargs sha256sum)"
   [ -n "${PKG_STAMP}" ] && data+=$'\n'"$(echo "${PKG_STAMP}" | sha256sum)"
 
-  echo "${data}" | sort | sha256sum | cut -d" " -f1
+  echo "${data}" | sha256sum | cut -d" " -f1
 }
 
 target_has_feature() {