<div dir="ltr">Hmmm .. still not installing on my OS X system.<div><br></div><div>I'm falling back to running in docker with:</div><div><br></div><div><font face="courier new, monospace">apt-get install -y libghc-lens-dev</font><br>
</div><div><br></div><div>Cheers,</div><div><br></div><div>-John</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On 12 May 2014 00:37, Mateusz Lenik <span dir="ltr"><<a href="mailto:mlen@mlen.pl" target="_blank">mlen@mlen.pl</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi John,<br>
<br>
I ran into it on 7.8.2, the solution was to install aeson, free and lens (in<br>
this order). This is due to the fact that:<br>
<br>
>  This is related to the recent update of transformers. If you could wait a few<br>
>  days until the packages depending on transformers are upgraded, you shouldn't<br>
>  run into any issues installing lens.<br>
<br>
Source: <a href="http://stackoverflow.com/questions/23510242/cabal-dependency-resolution-fail-for-lens" target="_blank">http://stackoverflow.com/questions/23510242/cabal-dependency-resolution-fail-for-lens</a><br>
<br>
Cheers,<br>
Mateusz<br>
<div><div class="h5"><br>
On Mon, May 12, 2014 at 12:29:19AM +1000, John Ky wrote:<br>
> Hi Haskell Cafe,<br>
><br>
> Anyone know about this error?<br>
><br>
> Installing library in<br>
> /Users/johnky/Library/Haskell/ghc-7.6.3/lib/reflection-1.4/lib<br>
> Registering reflection-1.4...<br>
> Installed reflection-1.4<br>
> Configuring mtl-2.0.1.0...<br>
> Building mtl-2.0.1.0...<br>
> Preprocessing library mtl-2.0.1.0...<br>
> [ 1 of 21] Compiling Control.Monad.Writer.Class (<br>
> Control/Monad/Writer/Class.hs, dist/build/Control/Monad/Writer/Class.o )<br>
> [ 2 of 21] Compiling Control.Monad.State.Class (<br>
> Control/Monad/State/Class.hs, dist/build/Control/Monad/State/Class.o )<br>
> [ 3 of 21] Compiling Control.Monad.Reader.Class (<br>
> Control/Monad/Reader/Class.hs, dist/build/Control/Monad/Reader/Class.o )<br>
> [ 4 of 21] Compiling Control.Monad.RWS.Class ( Control/Monad/RWS/Class.hs,<br>
> dist/build/Control/Monad/RWS/Class.o )<br>
> [ 5 of 21] Compiling Control.Monad.Identity ( Control/Monad/Identity.hs,<br>
> dist/build/Control/Monad/Identity.o )<br>
> [ 6 of 21] Compiling Control.Monad.Error.Class (<br>
> Control/Monad/Error/Class.hs, dist/build/Control/Monad/Error/Class.o )<br>
><br>
> Control/Monad/Error/Class.hs:93:18: Not in scope: `catch'<br>
> Failed to install mtl-2.0.1.0<br>
><br>
> Cheers,<br>
><br>
> -John<br>
><br>
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