Wrong version of jbuilder used

[bobot]

When trying the current version of opam2nix-repository, I obtain this error. It should come from here.

File "src/jbuild", line 32, characters 8-18:
Error: Unknown constructor universe

• Inside opam2nix-packages/examples/opam-dependencies
• nix-build --no-out-link --show-trace -I channel:nixos-18.03

Migrating to dune would perhaps fix things since the language is now fixed at a given version.

[bobot]

The channel is perhaps just the culprit. using pkgs-unstable works better.

[timbertson]

Yeah, that's it I'm afraid - universe is newish, but the old workaround I was using stopped working in a recent version too so I had to pick one.