The file you are referring to is actually a binary distribution that does not need to be compiled anymore. -- Lenz Grimmer ...
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ID Status▲ Resolution▲ Sev Product▲ Comp Assignee▲ Reporter Summary
56619 NEW --- nor Sisyphus eigen3 rider lakostis Breaking changes in 5.x.x

File a new bug in the "eigen3" component of the "Sisyphus" product