Watch out hackage revisions


Package version on Hackage can be overloaded with multiple revisions, nonetheless Hacakge web ui doesn’t have any sign how many revisions a package version has.

I discovered the issue after trying to understand why hslogger is not working for me on ghc901, mean while issues is closed and there is no any commit or release!

1 Like

The Hackage web UI does show the revisions for a package. For instance, lens-5.0.1 currently has 1 revision. From


If you click on Revision 1 here, you’re taken to Metadata revisions for lens-5.0.1 | Hackage, which is a list of all revisions.

There are some nice things about revisions, although I agree they are quite unintuitive and surprising. I sometimes wonder if the Haskell ecosystem would be better without them.