When trying to build from Source i get the following error:

[jparsert]

ERROR: the following packages are missing:

• ocp-indent-lib
• ocp-indent-lib

However ocp-indent is installed and ocp-indent-lib does not seem to exist on OPAM

[AltGr]

It's probably a version mismatch. The opam package mentions ocp-indent >= 1.4.1, but newer versions might be problematic (in which case, we need to port or at least document the version constraint in opam. In either case, thanks for reporting!)
What version of ocp-indent do you have installed ?
(note: you get this message from ocp-build because ocp-indent-lib is a ocamlfind "package" that should be included in the opam package ocp-indent)

[jparsert]

OCP-indent Version 1.5.2