Hmm, that's weird. It might be worth trying `./mach bootstrap`, then building again. That will ensure that new dependencies that are needed are downloaded. Would you mind running bootstrap, then performing a `./mach build -v` and posting the output?
Bug 1643162 Comment 5 Edit History
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Hmm, that's weird. It might be worth trying `./mach bootstrap`, then building again. That will ensure that new dependencies that are needed are downloaded. Would you mind running bootstrap, then (if the build is still failing) performing a `./mach build -v` and posting the output?