ANNOUNCE: GHC 7.10.1 Release Candidate 1 - problem with latest cabal-install

[George Colpitts]

I still have 7.8.3 but it doesn't seem to want to build the latest cabal:

 ghc --version
The Glorious Glasgow Haskell Compilation System, version 7.8.3
bash-3.2$ cabal install cabal-install
Resolving dependencies...
Configuring cabal-install-1.20.0.6...
Building cabal-install-1.20.0.6...
Installed cabal-install-1.20.0.6
Updating documentation index
/Users/gcolpitts/Library/Haskell/share/doc/index.html




On Thu, Jan 1, 2015 at 2:54 PM, Edward Z. Yang <ezyang at mit.edu> wrote:

> If you still have your old GHC around, it will be much better to
> compile the newest cabal-install using the *old GHC*, and then
> use that copy to bootstrap a copy of the newest cabal-install.
>
> Edward
>
> Excerpts from George Colpitts's message of 2015-01-01 12:08:44 -0500:
> > ​$ ​
> > cabal update
> > Downloading the latest package list from hackage.haskell.org
> > Note: *there is a new version of cabal-install available.*
> > To upgrade, run: cabal install cabal-install
> > bash-3.2$ *cabal install -j3 cabal-install *
> > *​...​*
> >
> >
> > *Resolving dependencies...cabal: Could not resolve dependencies:*
> > trying: cabal-install-1.20.0.6 (user goal)
> > trying: base-4.8.0.0/installed-779... (dependency of
> cabal-install-1.20.0.6)
> > next goal: process (dependency of cabal-install-1.20.0.6)
> > rejecting: process-1.2.1.0/installed-2db... (conflict: unix==2.7.1.0,
> > process
> > => unix==2.7.1.0/installed-4ae...)
> > trying: process-1.2.1.0
> > next goal: directory (dependency of cabal-install-1.20.0.6)
> > rejecting: directory-1.2.1.1/installed-b08... (conflict: directory =>
> > time==1.5.0.1/installed-c23..., cabal-install => time>=1.1 && <1.5)
> > rejecting: directory-1.2.1.0 (conflict: base==4.8.0.0/installed-779...,
> > directory => base>=4.5 && <4.8)
> > rejecting: directory-1.2.0.1, 1.2.0.0 (conflict:
> > base==4.8.0.0/installed-779..., directory => base>=4.2 && <4.7)
> > rejecting: directory-1.1.0.2 (conflict: base==4.8.0.0/installed-779...,
> > directory => base>=4.2 && <4.6)
> > rejecting: directory-1.1.0.1 (conflict: base==4.8.0.0/installed-779...,
> > directory => base>=4.2 && <4.5)
> > rejecting: directory-1.1.0.0 (conflict: base==4.8.0.0/installed-779...,
> > directory => base>=4.2 && <4.4)
> > rejecting: directory-1.0.1.2, 1.0.1.1, 1.0.1.0, 1.0.0.3, 1.0.0.0
> (conflict:
> > process => directory>=1.1 && <1.3)
> > Dependency tree exhaustively searched.
>
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