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
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...
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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