Am 10.02.2016 um 15:18 schrieb Adam Bergmark:
This is because a revision to the cabal file was published[1]. Tarballs always stay the same (because of possible signing, etc) but cabal-install will use the revised metadata when doing most of its operation including `install', `get', and `unpack'.
Hi Adam, thank you for the explanation. I tried to install cabal-install taken from GitHub for GHC 8.0.0.rc2 via the included `bootstrap.sh` script, which essentially obtains the tarball from hackage using `curl` and then calls $ cd mtl-2.2.1 $ ghc --make Setup.hs -o Setup $ ./configure # + additional options
You don't say how you are trying to install mtl, is it not through Cabal? Either way, make sure to use the revised cabal file and it should be fine.
Okay, I will then install mtl by hand and try the bootstrap script afterwards. Thanks, Björn