Re: [Haskell-cafe] Cabal: top level dependency base -any

On 2011 May 24, at 09:28, Ivan Lazar Miljenovic wrote:

On 24 May 2011 16:57, Jacek Generowicz wrote:

...

Hi,

Could anyone shed light on the meaning of this error message?

cabal: cannot configure xmonad-0.9.1 It requires base ==3.* For the dependency on base ==3.* there are these packages: base-3.0.3.1 and base-3.0.3.2. However none of them are available. base-3.0.3.1 was excluded because of the top level dependency base - any base-3.0.3.2 was excluded because of the top level dependency base - any [...] Any hints?

Yes: use xmonad-0.9,2 instead! It supports base-4, which is probably what you have (with GHC-7.0.*).

Indeed, I discovered that to be the solution in the meantime, as I noticed that on my other system xmonad-0.9.2 was being installed by cabal install. Doing a cabal update made everything go through (with xmonad-0.9.2). Which makes me wonder why the two systems had different ideas of what the most recent xmonad version was, as I installed both of them yesterday afternoon. I seem to be discovering a rule of thumb: do a cabal update *every time* you want to cabal install. Anyway, thanks for the hint.