Fmlib_std is a library of standard types. It has a lot of thin wrappers around modules of ocaml's standard library like
Fmlib_std.List etc. with some additional functionality and it contains some types which are not part of ocaml's standard library like e.g.
Install the library via
opam install fmlib_std
In order to compile program named
foo with the help of
dune write a dune file like
(executable (name foo) (libraries fmlib_std ...) ... )