Michael L Martin wrote:
On 10/16/2014 03:11 PM, Mateusz Kowalczyk wrote:
Merely going from the error message and your steps, it seems to me that you're *not* meant to install GHC yourself first and that the platform ships with GHC. I would say try again but without installing GHC and cabal first.
Well, that didn't work, either:
mmartin@cloud:~/Downloads/haskell-platform-2014.2.0.0$ ./platform.sh .../ghc-7.8.3-x86_64-unknown-linux-deb7.tar.bz2 ../platform.sh: 18: ./platform.sh: cabal: not found *** *** Building hptool *** ../platform.sh: 29: ./platform.sh: cabal: not found mmartin@cloud:~/Downloads/haskell-platform-2014.2.0.0$
Apparently, different distributions of the Haskell Platform differ in what tools they package: the binary distribution includes GHC and cabal, whereas the source distribution, which you are currently trying to install, doesn't include GHC and cabal. Judging from the error message
Stderr: mtl-2.1.3.1: package(s) with this id already exist: mtl-2.1.3.1
it seems that the platform tries to build the `mtl` package, but fails because it is already installed. You can use the command $ ghc-pkg list to see which packages are installed globally and in your home directory. Most likely, `mtl` got installed because you installed `cabal-install`. I have no idea how to deal with the conflict, though, I'm not really familiar with the Haskell platform source distribution. Best regards, Heinrich Apfelmus -- http://apfelmus.nfshost.com