On Wed, Jul 11, 2012 at 5:28 AM, Magicloud Magiclouds < magicloud.magiclouds@gmail.com> wrote:
Even I removed all user space packages, the error was still. I think it is a ghc pkg problem, that every package register itself as package:function while ghc (or cabal?) required package-version:function.
That's not the problem, it's the symptom. Package symbols are always versioned; ghc only shows the version when it's the only way to disambiguate symbols. So when it shows you a conflict where one is versioned and the other isn't, you have multiple versions of a package installed.
But --constraint='template-haskell-2.7.0.0' did make it compiled.
And that's how you prevent it. -- brandon s allbery allbery.b@gmail.com wandering unix systems administrator (available) (412) 475-9364 vm/sms