Fix unshallowing? #10

Job	Run time
extension	50s
build	1m 17s
format	1m 34s
tidy	40s
test (concurrent test programs)	6m 59s
lint (ubuntu-latest)	1m 44s
test (ubuntu-latest)	6m 47s
test (no submodules)	1m 47s
lint (windows-latest)	11m 48s
smoke	2m 29s
generate	1m 51s
test (race mode)	1d 0h 0m 1s
test (macos-latest)	5m 43s
lint (noembed)	1m 41s
misc	36s
test (windows-latest)	10m 19s
lint (macos-latest)	1m 58s
baselines	3m 53s
test (noembed)	2m 42s
required	4s
	1d 1h 4m 43s

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