$ cabal install errors
Resolving dependencies...
In order, the following would be installed:
exceptions-0.6.1 (reinstall) changes: mtl-2.1.2 -> 2.2.1, transformers-0.3.0.0
-> 0.4.2.0
transformers-base-0.4.3 (reinstall) changes: transformers-0.3.0.0 -> 0.4.2.0
monad-control-1.0.0.1 (new version)
transformers-compat-0.3.3.4 (reinstall) changes: transformers-0.3.0.0 ->
0.4.2.0
contravariant-1.2 (reinstall) changes: transformers-0.3.0.0 -> 0.4.2.0
distributive-0.4.4 (reinstall) changes: transformers-0.3.0.0 -> 0.4.2.0
comonad-4.2.2 (reinstall) changes: transformers-0.3.0.0 -> 0.4.2.0
semigroupoids-4.2 (reinstall) changes: transformers-0.3.0.0 -> 0.4.2.0
bifunctors-4.2 (reinstall)
profunctors-4.3.2 (reinstall) changes: transformers-0.3.0.0 -> 0.4.2.0
free-4.10.0.1 (new version)
either-4.3.2.1 (new version)
errors-1.4.7 (new package)
cabal: The following packages are likely to be broken by the reinstalls:
temporary-1.2.0.3
ghc-mod-5.2.1.1
resourcet-1.1.2.3
yaml-0.8.9.3
stylish-haskell-0.5.11.0
persistent-sqlite-1.3.0.5
persistent-1.3.3
persistent-template-1.3.2.2
monad-logger-0.3.8
hoogle-4.2.36
conduit-extra-1.1.4.2
conduit-1.2.3
either-4.3.2
monad-journal-0.5.0.1
resource-pool-0.2.3.1
monad-control-0.3.3.0
lifted-base-0.2.3.0
io-choice-0.0.5
HTF-0.12.2.3
free-4.9
Use --force-reinstalls if you want to install anyway.
I am using the ghc platform version 7.6.3.
Is this package obsolete? Why are so many packages likely to be broken?
With Haskell, how does one know what is a proper up to date package and what is not?
Andrew