Looks like the license is expat.
- [PATCH 00/96] ocaml-build-system and packages Julien Lepiller
- [PATCH 07/96] gnu: camlp4: Install camlp4 META file. Julien Lepiller
- [PATCH 06/96] gnu: ocaml: Use a helper function to d... Julien Lepiller
- Re: [PATCH 06/96] gnu: ocaml: Use a helper funct... David Craven
- [PATCH 01/96] gnu: ocaml: Add a .file directive to g... Julien Lepiller
- [PATCH 11/96] gnu: Add ocaml-zarith. Julien Lepiller
- [PATCH 02/96] gnu: ocaml: Add CAML_LD_LIBRARY_PATH s... Julien Lepiller
- [PATCH 03/96] gnu: camlp4: compile native Julien Lepiller
- [PATCH 08/96] gnu: Add ocaml-ounit. Julien Lepiller
- Re: [PATCH 08/96] gnu: Add ocaml-ounit. David Craven
- [PATCH 05/96] gnu: ocaml: Use a prefix for license f... Julien Lepiller
- [PATCH 13/96] gnu: Add ocaml-qtest Julien Lepiller
- [PATCH 10/96] gnu: Add ocamlmod. Julien Lepiller
- Re: [PATCH 10/96] gnu: Add ocamlmod. David Craven
- Re: [PATCH 10/96] gnu: Add ocamlmod. julien lepiller
- Re: [PATCH 10/96] gnu: Add ocamlmod. David Craven
- Re: [PATCH 10/96] gnu: Add ocamlmod... David Craven
- Re: [PATCH 10/96] gnu: Add ocam... David Craven
- Re: [PATCH 10/96] gnu: Add ocamlmod... Ludovic Courtès
- Re: [PATCH 10/96] gnu: Add ocam... Leo Famulari
