Patch incoming. Side-note: I'd recommend doing `./mach ...` instead of `mach ...` so that Mach doesn't use Python sources from one tree, but related non-Python files from the other. This is mostly an issue when handling multiple trees. (We used to recommend adding Mach to the `$PATH` before Python shenanigans were better-understand, is what I'm piecing together here in 2021).
Bug 1738947 Comment 2 Edit History
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~Patch incoming.~ You beat me to it 😁 Side-note: I'd recommend doing `./mach ...` instead of `mach ...` so that Mach doesn't use Python sources from one tree, but related non-Python files from the other. This is mostly an issue when handling multiple trees. (We used to recommend adding Mach to the `$PATH` before Python shenanigans were better-understand, is what I'm piecing together here in 2021).