patch for gnu/packages/scheme.scm

["Alexander Shendi" <Alexander.Shendi@web.de>]

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Dear list,

I have just installed Guix SD 0.8.2. I have initialized the system from the desktop template.

I noticed a problem with the mit-scheme 9.2 package. When inwoking the edwin editor from
the MIT-Scheme REPL (via "(edwin)"), I got an error message instead of the expected editor window:



;Can't find any usable display type
;To continue, call RESTART with an option number:
; (RESTART 1) => Return to read-eval-print level 1.

2 error> 

One reason for this is that libx11 is not listed a a dependency. The attached patch solves the problem.
It is rather simple, but I hope it is useful. 

TODO:
* Make Edwin work on a terminal (this still doesn't work)

I you have any questions, please mail me directly mailto:Alexander.Shendi@web.de , as I am not (yet)
subscribed to this list.

Best Regards and thanks for the fine Work on Guix SD so far,

Alexander 

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--- scheme.scm.orig	2015-05-19 00:58:17.452739364 +0200
+++ scheme.scm	2015-05-18 23:52:04.212718263 +0200
@@ -38,6 +38,7 @@
   #:use-module (gnu packages libffi)
   #:use-module (gnu packages fontutils)
   #:use-module (gnu packages image)
+  #:use-module (gnu packages xorg)
   #:use-module (ice-9 match))
 
 (define (mit-scheme-source-directory system version)
@@ -90,6 +91,7 @@
        ;; ("texlive-core" ,texlive-core)
        ("texinfo" ,texinfo)
        ("m4" ,m4)
+       ("libx11" ,libx11)
 
        ("source"