Dune build broken

[jlunder]

The dune-project file in root is broken by the most recent commit -- the version constraint requires parens around the whole dependency. I.e.,

zarith (>= 1.5)

should be

(zarith (>= 1.5))

Otherwise I expect it's trying to parse (>= 1.5) as a library name.

[sirix-v]

also have the problem while building the project