Verification error: invalid hash

[mgsloan]

Not sure how to reproduce this, but it seems that sometimes hackage-security gets stuck in a state of having an invalid hash commercialhaskell/stack#3771 . It seems like it's downloading it, but the only way to get it to work is to delete the existing files.

[hvr]

Maybe next time this occurs, backup the files before deleting them. That would be helpful to debug the problem.