Anyway, while we are at it, the following four bugs are similar and
they are all maintained by Debian OCaml Maintainers:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=806028
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=806209
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=806210
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=806625
Yes, I noticed those.
As far as I see, those all refer to debian/${package} for the location
of the source files, during documentation generation, which I believe
to be a package bug (and not a dh_ocamldoc bug).
I fixed those packages and pushed the fixed to the packaging repository.
Now, a DD form pkg-ocaml needs to review and upload those.