Hi - I've just downloaded and installed Edison using Cabal. However I now see that Edison seems to have been already installed with the ghc 6.4.2 installation, even though there's no mention of Edison in /doc/html/libraries/index.html, because there are old Edison .hi files in ghc-6.4.2/hslibs-imports/data whereas the Cabal install process copied newly built Edison files to C:\Program Files\Haskell\EdisonAPI-1.2\ghc-6.4.2\Data and C:\Program Files\Haskell\EdisonCore-1.2\ghc-6.4.2\Data I was about to just delete the old .hi files from the hslibs-imports/data directory, but then I noticed there are a few .hi files there for Set and FiniteMap, even though there are also .hi files (though of different sizes) for Set and FiniteMap stored in the imports/data directory as well. So my question is: how to understand all this? Why are there different copies of Set.hi which have different sizes, but in the same installation, and which one does ghc use when I use import Data.Set in a program? Also, what does .p_hi mean? (The new build of Edison only creates .hi files not .p_hi files but all the ghc-6.4.2 modules have both .hi and .p_hi files) (It would also be interesting to know where Cabal gets the information from to configure a package, and where the package database is stored...) Thanks, Brian. -- Logic empowers us and Love gives us purpose. Yet still phantoms restless for eras long past, congealed in the present in unthought forms, strive mightily unseen to destroy us. http://www.metamilk.com