jitsu not building from opam

[patrickangusjohngrant]

Hello,

Was hoping to have a play with this but the dependencies seem to be broken:

$ opam install jitsu
The following dependencies couldn't be met:
  - jitsu -> irmin <= 0.12.0
Your request can't be satisfied:
  - No package matches irmin<=0.12.0.

No solution found, exiting

Regards,

Patrick