From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andreas Enge <andreas@enge.fr>
Subject: Re: bug#22970: guix edit mutt -- not working
Date: Thu, 10 Mar 2016 00:44:33 +0100
Message-ID: <20160309234433.GA28823@solar>
References: <20160309232220.GA13286@protected.rcdrun.com>
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To: Jean Louis <guix@rcdrun.com>
Cc: 22970-done@debbugs.gnu.org, help-guix@gnu.org

On Thu, Mar 10, 2016 at 12:22:20AM +0100, Jean Louis wrote:
> And I could not save the file in my home directory, and do:
> guix package -i mutt -f mail.scm

As mentioned on IRC, modify the file mail.scm by adding a line
   mutt
at the end. Then
   guix package -f mail.scm
does "install the package that the code within FILE evaluates to" as
explained by "guix package --help". mail.scm itself does not evaluate
to anything, it just contains a number of variable definitions. By adding
the line, it "returns" the value of the variable mutt, which is your
package definition.

Better yet, use GUIX_PACKAGE_PATH, for instance as follows:
   export GUIX_PACKAGE_PATH=$HOME/guix
Then create the same file layout in that directory as in the source code:
   mkdir -p $HOME/guix/gnu/packages
Copy mail.scm there, modify mutt, then
   guix package -i mutt
will first look for your modified package.

As this is not a bug, it would have been better to post to help-guix@gnu.org;
let us continue the discussion there (if you are not yet subscribed, please
do so), and I am closing this bug.

Andreas