--- a/qtbase.pro.orig	2021-08-05 07:36:06.002781800 +0100
+++ b/qtbase.pro	2021-08-05 07:33:35.143611500 +0100
@@ -57,7 +57,7 @@
 # qtPrepareTool() to find the non-installed syncqt.
 prefix_build|!equals(PWD, $$OUT_PWD) {
 
-    cmd = perl -w $$shell_path($$PWD/bin/syncqt.pl)
+    cmd = perl -w $$system_path($$PWD/bin/syncqt.pl)
 
     TOOL_PRI = $$OUT_PWD/mkspecs/modules/qt_tool_syncqt.pri
 
