Should the macOS planner use a case-sensitive volume by default?

[lovesegfault]

This would allow disabling the case-hack option, and maybe resolve issues of sources having different output hashes on macOS and Linux.

Regardless, given that there's no real penalty to using a case-sensitive APFS volume, and the option is already supported in the planner, wouldn't it make sense to make it the default?

[Hoverbear]

I have no idea! From my reading there are several Mac applications which assume case-non-sensitivity but I don't really think that is an issue when using Nix...

Perhaps we should try it next release!

[lovesegfault]

Important to note that due to https://github.com/NixOS/nix/issues/1446 the planner will need to explicitly disable the case-hack option, since Nix just presumes Darwin = case insensitive.