From mboxrd@z Thu Jan  1 00:00:00 1970
From: Danny Milosavljevic <dannym@scratchpost.org>
Subject: Re: Question about  (properties `((python2-variant . ,(delay
	XXX)))) and name resolution
Date: Wed, 20 Jul 2016 09:26:37 +0200
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	<20160720035823.GB21435@jasmine>
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To: Leo Famulari <leo@famulari.name>
Cc: guix-devel@gnu.org

Hi Leo,

On Tue, 19 Jul 2016 23:58:23 -0400
Leo Famulari <leo@famulari.name> wrote:

> In this case, it looks like the Python 2 variant of the package is the
> same as the Python 3 variant, aside from the Python version. So, you
> should be able to drop the (properties `((python2-variant ...) line from
> the python-ptpython package.

I tried that, but I still can't do

  $ guix package -i ptpython-2

because:

  guix package: error: ptpython: package not found for version 2

.

I've since settled on

 (define-public ptpython-2
  (let ((base (package-with-python2 (strip-python2-variant ptpython))))
    (package
      (inherit base)
      (name "ptpython-2"))))

... which does work. On second thought the package-with-python2 probably can't recognize the name otherwise.

Now, the ptpython executables are still called the same - so you can't install ptpython and ptpython-2 at the same time.

> I hope that helps!

Yup, thanks!