Merge pull request #3005 from github/redsun82/unsupported-plat #4623

Job	Run time
Diagnostic export (ubuntu-latest, linked)	1m 26s
Diagnostic export (macos-latest, nightly-latest)	1m 49s
Diagnostic export (windows-latest, linked)	3m 12s
Diagnostic export (windows-latest, nightly-latest)	3m 11s
Diagnostic export (ubuntu-latest, nightly-latest)	1m 23s
Diagnostic export (macos-latest, linked)	2m 5s
	13m 6s

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