Hello, When I noticed the recently released HTTP-4000.2.5[1] package used a CABAL-flag based approach[2] for what I expected the use of a macro MIN_VERSION_network(2,4,0) to be more appropriate (see [3]), I wasn't totally sure whether there was any down-side with the MIN_VERSION_-approach. So my question is: Is it always desirable to prefer the MIN_VERSION_ approach over a CABAL-flag approach for supporting multiple API versions of a dependent package (if both ways are possible)? And if not, when should I prefer which approach? [1]: http://hackage.haskell.org/package/HTTP-4000.2.5 [2]: https://github.com/haskell/HTTP/commit/7a266219284ff33d66fa5e3f67f406c2616fe... [3]: https://github.com/haskell/HTTP/pull/30 cheers, hvr --