diff -rupN --no-dereference qtbase-everywhere-src-5.15.10/src/tools/bootstrap/bootstrap.pro qtbase-everywhere-src-5.15.10-new/src/tools/bootstrap/bootstrap.pro
--- qtbase-everywhere-src-5.15.10/src/tools/bootstrap/bootstrap.pro	2023-06-15 10:08:00.931886077 +0200
+++ qtbase-everywhere-src-5.15.10-new/src/tools/bootstrap/bootstrap.pro	2023-06-15 10:08:07.954948345 +0200
@@ -112,6 +112,7 @@ SOURCES += \
            ../../corelib/tools/qline.cpp \
            ../../corelib/tools/qversionnumber.cpp \
            ../../xml/dom/qdom.cpp \
+           ../../xml/dom/qdomhelpers.cpp \
            ../../xml/sax/qxml.cpp
 
 unix:SOURCES += ../../corelib/kernel/qcore_unix.cpp \