diff -up qwt-6.1.3/designer/designer.pro.no_rpath qwt-6.1.3/designer/designer.pro

--- qwt-6.1.3/designer/designer.pro.no_rpath	2016-06-13 02:14:23.019600853 -0500

+++ qwt-6.1.3/designer/designer.pro	2017-03-08 12:11:49.591323453 -0600

@@ -83,7 +83,7 @@ contains(QWT_CONFIG, QwtDesigner) {

         # compile the path for finding the Qwt library

         # into the plugin. Not supported on Windows !

-        QMAKE_RPATHDIR *= $${QWT_INSTALL_LIBS}

+        #QMAKE_RPATHDIR *= $${QWT_INSTALL_LIBS}

         qwtAddLibrary($${QWT_OUT_ROOT}/lib, qwt)

         contains(QWT_CONFIG, QwtDll) {