diff --git a/scripts/unpack b/scripts/unpack
index fd7bbf1da0..1fc760aefc 100755
--- a/scripts/unpack
+++ b/scripts/unpack
@@ -68,7 +68,7 @@ if [ -d "$SOURCES/${PKG_NAME}" -o -d "$PKG_DIR/sources" ]; then
   fi
 
   _pkg_build="$(basename "${PKG_BUILD}")"
-  [ -d "${PKG_UNPACK_DIR}/${_pkg_build}"* ] && mv "${PKG_UNPACK_DIR}/${_pkg_build}"* "${PKG_BUILD}"
+  [ -z "${PKG_SOURCE_DIR}" -a -d "${PKG_UNPACK_DIR}/${_pkg_build}"* ] && mv "${PKG_UNPACK_DIR}/${_pkg_build}"* "${PKG_BUILD}"
 
   if [ ! -d "${PKG_BUILD}" ]; then
     if [ -n "${PKG_SOURCE_DIR}" ]; then