While I'm still on 4.08 after being burned by the transition from 4.07 to 4.08, it should probably be the case that travesty works on 4.09.
Currently it rejects 4.09 in the opam manifest, so the first step would be to see if it can build on 4.09, weaken the manifest if possible, and cry in a corner and await the necessary upstream churn if not.
While I'm still on 4.08 after being burned by the transition from 4.07 to 4.08, it should probably be the case that
travesty
works on 4.09.Currently it rejects 4.09 in the opam manifest, so the first step would be to see if it can build on 4.09, weaken the manifest if possible, and cry in a corner and await the necessary upstream churn if not.