Add a fallback for when project version is `unspecified` (#1536) #386

Job	Run time
Test Processing	4m 2s
(macos/x64) Create Processing Build	4m 44s
(linux/aarch64) Create Processing Build	3m 45s
(windows/x64) Create Processing Build	7m 40s
(linux/x64) Create Processing Build	5m 10s
(macos/aarch64) Create Processing Build	5m 27s
	30m 48s

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