Hello to everone, Did anybody manage to install parconc-examples on a Raspberry Pi2 without the use of --force-reinstalls. As it would break to many packages on my end.I tried it the way describe from Simon Marlow s book "Parallel and concurrent programming in haskell". Or is there any option within cabal to seperate between new,new version and reinstall packages listed with pi@opencvrpi2:~/parconc-examples-master$ cabal install --only-dependencies I m using ghc 7.4.1 Thanks for any feedback Gottfried F. Zojer