What are minimumOCamlVersion and minimalOCamlVersion in nixpkgs? How do they differ?
The manual mentions only minimalOCamlVersion:
It defines an (optional) attribute
minimalOCamlVersionthat will be used to throw a descriptive evaluation error if building with an older OCaml is attempted.
I think minimumOCamlVersion was considered inaccurate wording at some point (probably there is a discussion about this someone could dig up) and buildDunePackage started accepting both. minimalOCamlVersion is the proper argument and should be used going forwards.
https://github.com/NixOS/nixpkgs/pull/126488
To make the situation clearer, we probably should clean up remaining instances of minimumOCamlVersion and add a deprecation warning for it.
It might be worth adding a line in the documentation to warn about the old spelling.