When trying to compile containers-0.2.0.1 with cabal-install 0.8.0, I get the following: Data/IntMap.hs:182:7: Could not find module `Data.Data': It is a member of the hidden package `base'. Perhaps you need to add `base' to the build-depends in your .cabal file. Use -v to see a list of the files searched for. This does not occur when I install using the Setup.hs included with containers. Also, if I put a version range on base in containers.cabal (I tried >= 4 && < 5), it also works just fine. Any chance of getting a containers-0.2.0.2 released with a version range on base? Thanks, Michael