In summary - cabal-install 0.14 outputs more info than the build scripts expect under some circumstances. The proposed fix simply made the build scripts ignore the extra, and should be benign...
However, after thinking about it, I think we should *not* make that change in this release: The extra information is indication that the packages about to be will likely cause havoc vis-a-vis the package database cabal is running against. If you are packaging packages for a distribution of Haskell Platform, you should be doing this in an environment where that doesn't happen. In particular, you should be using a package database that starts with only exactly that which GHC 7.4.1 provides. See src/macos/Makefile through the target "build" for how to do this. For the next HP (2012.4.0.0) I intend to re-write this whole part of the build process. It will still rely on cabal to do the build ordering (which is what this part of the build is doing), but I'm not sure where that code will end up - and will certainly be re-written. At that time I'll take into account the extra info - probably issuing warnings or errors. If I had my druthers (and if I find the skillz) I'd like to be able to make the whole hermetic build process that the mac build does be generic. - Mark
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