May be you can update the version of core in opam to 113.33.03. `oci` [does not compile](http://paste.isomorphis.me/Vxc) with the constraint `"core" {= "113.33.00"}`.
May be you can update the version of core in opam to 113.33.03.
ocidoes not compile with the constraint"core" {= "113.33.00"}.