Ivan Lazar Miljenovic wrote:
You don't install containers by hand.
I didn't want to, I had to do this because one library depending on them ceased to install.
This package sounds a bit like the package you're trying to install hasn't been updated to the latest version of GHC (containers-0.2 was GHC-6.10, wasn't it?).
On http://hackage.haskell.org/package/containers-0.2.0.1 it is stated that it's "Built on: ghc-6.12" ----------------------------------------------------------------------- Daniel Fischer wrote:
containers-0.2.0.1 (reinstall) changes: base-4.1.0.0 -> 3.0.3.1
And it's pretty adamant about the last line.
Try containers-0.2.0.0, cabal-install doesn't announce to ignore the base- constraint for that one.
Alas, with ghc-6.12.2, I had the same error for containers-0.2.0.0
containers-0.2.0.1 doesn't give an upper bound for the base version, so cabal-install chooses base-3 by default (less likely to break on older packages than the still more reduced base-4).
Do you mean that if it's just "build-depends: base" without version constraint, cabal-install has some special code that chooses the third version of base? I'd like to note that I finally managed to install the package after changing "build-depends: base, array" to "build-depends: base == 4.*, array" in containers.cabal file. Thanks for some pointers.