bug#26914: gnu: xmonad: Update to 0.13.

[Ricardo Wurmus <rekado@elephly.net>]

Mekeor Melire <mekeor.melire@gmail.com> writes:

> I tested both patches again now: they work. I tested them using both
>
>   $ ./pre-inst-env guix build      xmonad ghc-xmonad-contrib # and
>   $ ./pre-inst-env guix package -i xmonad ghc-xmonad-contrib
>
> and both worked.
>
> Before building the package, I applied the patch for ghc-x11, then I
> applied the patch for xmonad and ghc-xmonad-contrib.

Yes, you’re right.  The patch for “ghc-x11” actually hadn’t been
pushed.  I was able to build xmonad, but I noticed these warnings:

--8<---------------cut here---------------start------------->8---
Configuring xmonad-0.13...
Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package process-1.2.3.0 requires directory-1.2.2.0
package xmonad-0.13 requires directory-1.2.7.0
--8<---------------cut here---------------end--------------->8---

This indicates that we really need to update other packages too.
I’ll push this now and close this bug, but we really need to harmonise
the Haskell packages.

--
Ricardo

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