On Tuesday 30 April 2013, 10:05:28, Johannes Engels wrote:
Hello, using the OS-specific Haskell packages of the Ubuntu distribution, I have some cabal packages installed in addition, e.g. hmatrix etc. After an upgrade to Ubuntu 13.04 most of these cabal packages are broken because some dependencies do not exist anymore or have been upgraded also, respectively. With ghc-pkg check I get messages like
There are problems in package hmatrix-0.14.0.1: dependency "array-0.4.0.0-0b32f6f98c0297dbb0e5cfc0087bd1f0" doesn't exist dependency "base-4.5.0.0-c8e7184681d410015e93df85fc49e9dd" doesn't exist ....
Actually now array-0.4.0.1 is installed etc. What is the recommended way to repair this? Should I do a --reinstall of the cabal packages (which should mostly also work with the upgraded dependencies)? Any hint would be welcome!
You have a different version of array, so you most likely have a different version of GHC. That means you have to rebuild your cabal packages. Check with the --dry-run flag first, $ cabal install world --dry-run whether cabal finds a consistent install plan. But that ghc-pkg check searches the package-db of the previous version irritates me. It should see that that is from an older version and ignore it.
Best regards Johannes Engels