diff --git a/scripts/unpack b/scripts/unpack
index cf418ad34e..c1b342a6ba 100755
--- a/scripts/unpack
+++ b/scripts/unpack
@@ -66,6 +66,18 @@ if [ -n "$PKG_URL" ]; then
   $SCRIPTS/extract $1 "$1*.7z"      $BUILD
 fi
 
+if [ -f $PKG_DIR/package.mk ]; then
+  # unset functions
+  unset -f post_unpack
+
+  . $PKG_DIR/package.mk
+
+  # post_unpack (replaces PKG_DIR/rename)
+  if [ "$(type -t post_unpack)" = "function" ]; then
+    post_unpack
+  fi
+fi
+
 [ -f "$PKG_DIR/rename" ] && $PKG_DIR/rename $@ >&$VERBOSE_OUT
 
 if [ -d "$PKG_DIR/sources" ]; then