[Haskell-cafe] More cabal install problems

Brandon Allbery allbery.b at gmail.com
Tue Jan 3 03:49:30 CET 2012

On Mon, Jan 2, 2012 at 21:36, Victor Miller <victorsmiller at gmail.com> wrote:

> <command line>: cannot satisfy -package-id
> mtl-
>     (use -v for more information)
> However, cabal list tells me:
> * mtl
>     Synopsis: Monad classes, using functional dependencies
>     Default available version:
>     Installed versions:
>     License:  BSD3

The right version, but possibly not the right ABI hash.  Also, it might be
broken by some other dependency; try "ghc-pkg list" which should give you
an idea about both issues.  ghc is regrettably not very good about saying
*why* it "cannot satisfy" a package dependency.

brandon s allbery                                      allbery.b at gmail.com
wandering unix systems administrator (available)     (412) 475-9364 vm/sms
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