resolver.nameservers may need to be a list of strings #33
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I don't know if this might instead not be an issue I've only got in my setup, but (1) this line broke my setup for me (with the regrettably non-helpful error message "DNS timeout", leading to some hours of debugging), (2) in other places in this hook, it is handled as a list of strings, suggesting that's indeed what it should be (but the lack of open issues about this and the age of the line of code is confusing - although possibly #30 may be related).
Turning it into a list of strings fixed my problems.
Feel free to accept or reject as you see fit - you're a much better judge if this is just my setup's problem and would break things for other people, or if this is a fix of a general problem! :)