Hello,

If you do ubuntu "xxx" with xxx that is not in your repo, you get

Uncaught exception:
  
  (Invalid_argument "option is None")

Raised at Lwt.Miscellaneous.poll in file "src/core/lwt.ml", line 3141, characters 20-29
Called from Lwt_main.run.run_loop in file "src/unix/lwt_main.ml", line 28, characters 10-20
Called from Stdlib__Fun.protect in file "fun.ml", line 34, characters 8-15
Re-raised at Stdlib__Fun.protect in file "fun.ml", line 39, characters 6-52
Called from Lwt_main.run in file "src/unix/lwt_main.ml", line 112, characters 8-13
Re-raised at Lwt_main.run in file "src/unix/lwt_main.ml", line 118, characters 4-13
Called from Command.For_unix.run.(fun) in file "command/src/command.ml", lines 3388-3399, characters 8-31
Called from Base__Exn.handle_uncaught_aux in file "src/exn.ml", line 126, characters 6-10

which is a nix-level of unhelpful ;)

I’ll find a fix later. Madx