lake build modifies manifest

[gebner]

This causes a build failure in mathport:

git clone https://github.com/leanprover-community/mathport
cd mathport
git checkout f071992a732b95d49b75111dfbdd9cdd9cd371dc
lake print-paths  # lake build works too but takes longer and fails
git diff          # shows modified manifest.json!

[gebner]

I think this happens because aesop and mathlib4 reference different revisions of std4 in their manifests.

[tydeu]

Yeah, I think your interpretation is correct. I believe this is thus the same root problem as #70.

[tydeu]

Fixed by #138 (not sure why GitHub did not automatically close it already).