Fix Qt5-Qt6 coinstall #49

Job	Run time
build (ubuntu-22.04, Debug, static, 5.15)	3m 37s
build (ubuntu-22.04, Debug, static, 6.5.*)	5m 9s
build (ubuntu-22.04, Debug, shared, 5.15)	3m 25s
build (ubuntu-22.04, Debug, shared, 6.5.*)	5m 47s
build (ubuntu-22.04, Release, static, 5.15)	1m 12s
build (ubuntu-22.04, Release, static, 6.5.*)	1m 41s
build (ubuntu-22.04, Release, shared, 5.15)	1m 25s
build (ubuntu-22.04, Release, shared, 6.5.*)	2m 11s
build (windows-2022, Debug, static, 5.15)	15m 43s
build (windows-2022, Debug, static, 6.5.*)	18m 12s
build (windows-2022, Debug, shared, 5.15)	15m 53s
build (windows-2022, Debug, shared, 6.5.*)	17m 34s
build (windows-2022, Release, static, 5.15)	2m 5s
build (windows-2022, Release, static, 6.5.*)	2m 36s
build (windows-2022, Release, shared, 5.15)	1m 54s
build (windows-2022, Release, shared, 6.5.*)	3m 30s
build (macos-12, Debug, static, 5.15)	5m 59s
build (macos-12, Debug, static, 6.5.*)	8m 30s
build (macos-12, Debug, shared, 5.15)	5m 44s
build (macos-12, Debug, shared, 6.5.*)	5m 30s
build (macos-12, Release, static, 5.15)	1m 35s
build (macos-12, Release, static, 6.5.*)	2m 28s
build (macos-12, Release, shared, 5.15)	1m 15s
build (macos-12, Release, shared, 6.5.*)	3m 57s
	2h 16m 52s

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