Brandon, Thanks again.  That put me on the right track.   When I did a ghc-pkg list it added a message saying that the cache was out of date and that I should run ghc-pkg recache.  I did that and gio appears to installing.

Victor

On Mon, Jan 2, 2012 at 9:49 PM, Brandon Allbery <allbery.b@gmail.com> wrote:
On Mon, Jan 2, 2012 at 21:36, Victor Miller <victorsmiller@gmail.com> wrote:
<command line>: cannot satisfy -package-id mtl-2.0.1.0-5b7a9cce5565d8cc8721ba4f95becf1b
    (use -v for more information)

However, cabal list tells me:

* mtl
    Synopsis: Monad classes, using functional dependencies
    Default available version: 2.0.1.0
    Installed versions: 2.0.1.0
    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.

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brandon s allbery                                      allbery.b@gmail.com
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