How to build an OCAML project


I am trying to build the project ( with Ocaml 4.03.0 but is not working. After installing all dependencies with opam I get the error:

I don’t know why I get this error because the package which is missing is listed in opam but not in ocamlfind.
How can I update ocamlfind such that it finds the missing package?
I have already tried to run eval $(opam config env) but this does not fix the problem.


I have no experience with fattire package, but from the snapshot and link you gave, package frenetic depends on OCaml with version larger than 4.05.0. [] suggests 4.06.0. Maybe you can try this instead of 4.03.0.