* gnu/packages/ocaml.scm (ocaml-base64): Update to 3.2.0.
[origin]: Use git-fetch.
(ocaml-piqilib)[origin]: Add a patch to fix building with new
versions of ocaml-base64.
* gnu/packages/patches/ocaml-piqilib-Update-base64.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
Julien Lepiller