The error message you're getting is pretty un-helpful - what's
happened is that EMGM has declared that it is only compatible with
template-haskell version 2.3, however GHC 6.12 ships with
template-haskell version 2.4. So caball helpfully tries to install the
older version of template-haskell and fails. (for the curious, if you
get packed-string to install, installing template-haskell 2.3 will
still result in misery, as it is a "magic" package which relies on
being installed at the same time as GHC - there's no simple way to
have multiple versions working).
To get a better error message, you'll want to edit the EMGM package
description and allow it to try and build with template-haskell 2.4
(this will be the file names 'emgm.cabal').
Antoine
On Mon, Oct 4, 2010 at 11:36 PM, Hans Peter Würmli
I tried to install EMGM from Hackagedb under ghc 6.12.1 (Debian Packages). The process ends with:
"... Building packedstring-0.1.0.1...
Data/PackedString.hs:83:7: Could not find module `Data.Data': It is a member of the hidden package `base'. Perhaps you need to add `base' to the build-depends in your .cabal file. Use -v to see a list of the files searched for. cabal: Error: some packages failed to install: emgm-0.3.1 depends on packedstring-0.1.0.1 which failed to install. packedstring-0.1.0.1 failed during the building phase. The exception was: ExitFailure 1 template-haskell-2.3.0.1 depends on packedstring-0.1.0.1 which failed to install."
Also I noticed that the last upload was version 0.3.1. Is the library still under maintenance?
Cheers
Hans Peter _______________________________________________ Generics mailing list Generics@haskell.org http://www.haskell.org/mailman/listinfo/generics