Hi. I'm installing the Haskell Platform om my Linux box and need some tips on how to structure the files on the OS. I need to install and use both GHC 6.12.3 and GHC 7.0.2. Hence I want to separate these installations. I've setup two directories, one for each platform (related to the GHC): # ls -d -1 $PWD/*.* /usr/haskell/2010.2.0.0 /usr/haskell/2011.2.0.0 I've installed GHC-6.12.3 in "2010.2.0.0" and will install GHC-7.0.2 in "2011.2.0.0". My question is more related to where I should install the packages. When I install a package using "runhaskell Setup ..." I assumed this to ONLY be installed for the version of GHC I'm using when installing it. Am I right about this? Having $PATH pointing to GHC-6.12.3 I've done this when installing packages, to add them to "2010.2.0.0": - - - - - - - cd /usr/src wget http://hackage.haskell.org/packages/archive/transformers/0.2.2.0/transformer... tar xzf transformers-0.2.2.0.tar.gz cd transformers-0.2.2.0 runhaskell Setup configure --prefix=/usr/haskell/2010.2.0.0/ runhaskell Setup build runhaskell Setup install - - - - - - - Later when I switch to GHC-7.0.2 I plan to install the packages into the "2011.2.0.0" directory in stead. Is this a good way to structure several Haskell installations on the same system? Is there a "best practice" on how to structure the files? I want to get this right from the start, to avoid having to go back and re-arrange everything. Regards, Frode K [k]