Hi Chris,

> That error looks suspicious.  Perhaps you already know this, but it
> probably means that the string "mirror.hydra.gnu.org" wound up being
> used where a procedure should probably have been used instead.  For
> example, in your Guile REPL, you can reproduce this kind of error like
> this:
>
>     scheme@(guile-user)> ("this is not a procedure")
>     ERROR: ERROR: Wrong type to apply: "this is not a procedure"

Suspicious indeed...

> The workaround that Ludo described, in which you temporarily stop the
> guix-daemon, and then start it in an environment where http_proxy is set
> appropriately, should work.

That's exactly what I did.

> If it isn't, then can I ask to see the commands and conigs you're
> using which fail?

Here are the commands I typed:

   sudo -s
   herd stop guix-daemon
   http_proxy=http://proxy.synchrotron-soleil.fr:8080/  guix-daemon --build-users-group=guixbuild
   guix system reconfigure /etc/config.scm

The config I used in this first test (attached) is exactly the same one
I am currently running, with no reference to the proxy at all. I was
planning to add that in a second step.

Konrad.