diff -rupN --no-dereference qtbase-everywhere-src-5.15.6/src/corelib/global/qlibraryinfo.cpp qtbase-everywhere-src-5.15.6-new/src/corelib/global/qlibraryinfo.cpp
--- qtbase-everywhere-src-5.15.6/src/corelib/global/qlibraryinfo.cpp	2022-06-24 12:42:02.000000000 +0200
+++ qtbase-everywhere-src-5.15.6-new/src/corelib/global/qlibraryinfo.cpp	2022-09-22 10:05:29.520826121 +0200
@@ -675,7 +675,7 @@ static QString getPrefix(
     if (group == QLibraryInfo::DevicePaths)
         return QString::fromLocal8Bit(QT_CONFIGURE_PREFIX_PATH);
 #  endif
-    return getExtPrefixFromHostBinDir();
+    return QString::fromLocal8Bit(QT_CONFIGURE_PREFIX_PATH);
 #elif QT_CONFIG(relocatable)
     return getRelocatablePrefix();
 #else