Are v1 uuids thread safe?

[qwbarch]

I noticed one of the internal functions it depends on states this:

Isn't system wide or thread safe, nor does it properly randomize the clock value on initialization.

Source: https://hackage.haskell.org/package/uuid-1.3.15/docs/src/Data.UUID.V1.html#ByteSink
Perhaps this should be documented for nextUUID if that's the case.