ghc865 no longer available upstream for bootstrapping

[jonringer]

When trying to use haskell.nix on top of latest unstable/25.05, you get the following error when trying to access haskell-nix.haskellPackages

       error: attribute 'ghc865' missing

       at /nix/store/y0qnm2w3lg0bx5rvzcg81jhq3s3fb65v-source/snapshots.nix:20:21:

           19|     pkg-def-extras = (pkg-def-extras name)
           20|       ++ [(hackage: ghc-boot-packages.${(pkg-def hackage).compiler.nix-name})];
             |                     ^
           21|     modules = [
       Did you mean one of ghc965, ghc925, ghc945, ghc961 or ghc962?

[jonringer]

looks like upstream has a ghc865Binary, now.