Thanks Mark!  I made most of these adjustments...

Mark H Weaver writes:

>> Unfortunately, guilemacs-guile does not complete building.  It compiles,
>> but then fails "make check":
>>   http://pamrel.lu/2aa8f/
>
> These are known issues.  Perhaps we should just disable tests for now.

BT Templeton fixed some issues, but I'm still hitting failures with the
popen tests.  I removed the "check" build step for now, at your suggestion.

>> diff --git a/gnu/packages/guile.scm b/gnu/packages/guile.scm
>> index 751002f..33d5773 100644
>> --- a/gnu/packages/guile.scm
>> +++ b/gnu/packages/guile.scm
>> @@ -41,7 +41,8 @@
>>    #:use-module (guix build-system gnu)
>>    #:use-module (guix build-system trivial)
>>    #:use-module (guix utils)
>> -  #:use-module (ice-9 match))
>> +  #:use-module (ice-9 match)
>> +  #:export (guile-2.0))
>
> No need for this, because 'define-public' is used to define guile-2.0.

Okay... it didn't seem to work without it but I'll look again tomorrow.

I incorporated the other feedback!

Unfortunately, it still doesn't build:

Loading /tmp/nix-build-guile-emacs-20150209.8f2e203.drv-3/source/lisp/progmodes/prog-mode.el (source)...
Loading /tmp/nix-build-guile-emacs-20150209.8f2e203.drv-3/source/lisp/emacs-lisp/lisp-mode.el (source)...
Scheme error: unbound-variable, (#<scheme module-lookup> #<scheme Unbound variable: ~S> (regexp-opt) #<scheme #f>)
Makefile:91: recipe for target '../../source/leim/../lisp/leim/quail/TONEPY.el' failed
make[2]: *** [../../source/leim/../lisp/leim/quail/TONEPY.el] Error 255
make[2]: Leaving directory '/tmp/nix-build-guile-emacs-20150209.8f2e203.drv-3/build/leim'
Makefile:603: recipe for target '../../source/src/../lisp/leim/leim-list.el' failed
make[1]: *** [../../source/src/../lisp/leim/leim-list.el] Error 2
make[1]: *** Waiting for unfinished jobs....

I don't really know enough to know what's going on and how to fix it.
Maybe a more seasoned Guile hacker could look....?