--- qwt-6.1.4/qwtbuild.pri.orig	2020-02-28 08:25:24.337340800 +0300
+++ qwt-6.1.4/qwtbuild.pri	2020-02-28 08:26:14.550861400 +0300
@@ -54,7 +54,7 @@
     # might need a debug version.
     # Enable debug_and_release + build_all if you want to build both.
 
-    CONFIG           += debug_and_release
+    CONFIG           += release
     CONFIG           += build_all
 }
 else {
