guix 0.7 installation

[Federico Beffa]

> I've tried to search for the emacs keyword with:
> guix package -s emacs
>
> and get a listing of some packages, but also the following error:
> ...

I then tried to install emacs anyway, but the gnu substitute was not responsive:

$ guix package -i emacs
;;; note: source file /usr/local/share/guile/site/2.0/srfi/srfi-37.scm
;;;       newer than compiled /usr/local/share/guile/site/2.0/srfi/srfi-37.go
The following package will be installed:
   emacs-24.3    out    /gnu/store/df5arx0v0f5dzqw2rvr6sr8glmxdbml5-emacs-24.3

substitute-binary: ;;; note: source file
/usr/local/share/guile/site/2.0/srfi/srfi-37.scm
substitute-binary: ;;;       newer than compiled
/usr/local/share/guile/site/2.0/srfi/srfi-37.go
substitute-binary: guix substitute-binary: warning: while fetching
http://hydra.gnu.org/0bhfhlas7rm13mp7hgjbbasj22fvva69.narinfo: server
is unresponsive
substitute-binary: guix substitute-binary: warning: try
`--no-substitutes' if the problem persists

So, I thought that maybe updating was a good idea:

$ guix pull
;;; note: source file /usr/local/share/guile/site/2.0/srfi/srfi-37.scm
;;;       newer than compiled /usr/local/share/guile/site/2.0/srfi/srfi-37.go
starting download of `guix-file.op6sCK' from
`http://git.savannah.gnu.org/cgit/guix.git/snapshot/guix-master.tar.gz'...
ERROR: In procedure put-bytevector: Wrong type argument in position 2
(expecting bytevector): #f
failed to download "guix-file.op6sCK" from
"http://git.savannah.gnu.org/cgit/guix.git/snapshot/guix-master.tar.gz";
guix pull: error: failed to download up-to-date source, exiting

By the way, I'm using Debian 7.6 and the installed guile is 2.0.5+1-3.

Regards,
Fede