But as has been mentioned elsewhere, the accidental uploads is far worse than it seems at first, since cabal can backtrack and continue using the bad version! If I upload foo-1.0.0.1 that mistakenly says it works with bar 1.1, and then issue a point release foo-1.0.0.2 that puts the upper bound back on bar, cabal will no longer get any PVP upper bound benefits, since it will simply try to use foo-1.0.0.1.