By: Tom Sydney Kerckhove <syd@cs-syd.eu>
Use addTestToolDepend(s) instead of overrideCabal testDepends testDepends is for Haskell library deps; postgres/redis/sqitch are binaries that need to be on $PATH at test runtime, which is what testToolDepends expresses. addTestToolDepend(s) is the dedicated helper and also makes these lines a lot shorter.