Because some program use both `extlib` and `cohttp` and `extlib` has a toplevel module named `Base64`. See https://github.com/AltGr/opam-publish/issues/13.
Because some program use both
extlibandcohttpandextlibhas a toplevel module namedBase64. See https://github.com/AltGr/opam-publish/issues/13.