[Haskell-cafe] cabal install lens fails

[John Ky]

Hmmm .. still not installing on my OS X system.

I'm falling back to running in docker with:

apt-get install -y libghc-lens-dev

Cheers,

-John


On 12 May 2014 00:37, Mateusz Lenik <mlen at mlen.pl> wrote:

> Hi John,
>
> I ran into it on 7.8.2, the solution was to install aeson, free and lens
> (in
> this order). This is due to the fact that:
>
> >  This is related to the recent update of transformers. If you could wait
> a few
> >  days until the packages depending on transformers are upgraded, you
> shouldn't
> >  run into any issues installing lens.
>
> Source:
> http://stackoverflow.com/questions/23510242/cabal-dependency-resolution-fail-for-lens
>
> Cheers,
> Mateusz
>
> On Mon, May 12, 2014 at 12:29:19AM +1000, John Ky wrote:
> > Hi Haskell Cafe,
> >
> > Anyone know about this error?
> >
> > Installing library in
> > /Users/johnky/Library/Haskell/ghc-7.6.3/lib/reflection-1.4/lib
> > Registering reflection-1.4...
> > Installed reflection-1.4
> > Configuring mtl-2.0.1.0...
> > Building mtl-2.0.1.0...
> > Preprocessing library mtl-2.0.1.0...
> > [ 1 of 21] Compiling Control.Monad.Writer.Class (
> > Control/Monad/Writer/Class.hs, dist/build/Control/Monad/Writer/Class.o )
> > [ 2 of 21] Compiling Control.Monad.State.Class (
> > Control/Monad/State/Class.hs, dist/build/Control/Monad/State/Class.o )
> > [ 3 of 21] Compiling Control.Monad.Reader.Class (
> > Control/Monad/Reader/Class.hs, dist/build/Control/Monad/Reader/Class.o )
> > [ 4 of 21] Compiling Control.Monad.RWS.Class (
> Control/Monad/RWS/Class.hs,
> > dist/build/Control/Monad/RWS/Class.o )
> > [ 5 of 21] Compiling Control.Monad.Identity ( Control/Monad/Identity.hs,
> > dist/build/Control/Monad/Identity.o )
> > [ 6 of 21] Compiling Control.Monad.Error.Class (
> > Control/Monad/Error/Class.hs, dist/build/Control/Monad/Error/Class.o )
> >
> > Control/Monad/Error/Class.hs:93:18: Not in scope: `catch'
> > Failed to install mtl-2.0.1.0
> >
> > Cheers,
> >
> > -John
> >
> > --
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