From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: libjpeg-8 not installable
Date: Sat, 19 Jan 2013 22:30:17 +0100
Message-ID: <87y5foyi6u.fsf@gnu.org>
References: <201301191216.29184.andreas@enge.fr>
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In-Reply-To: <201301191216.29184.andreas@enge.fr> (Andreas Enge's message of
	"Sat, 19 Jan 2013 12:16:28 +0100")
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To: Andreas Enge <andreas@enge.fr>
Cc: bug-guix@gnu.org

Hi!

Andreas Enge <andreas@enge.fr> skribis:

> libjpeg-8 is listed by "guix-package --list-available", and built without=
=20
> problem by "guix-build libjpeg-8". However:
>
> $ guix-package -i libjpeg-8
> libjpeg-8: package not found

(Note that you could do: guix-package -i `guix-build libjpeg-8`.)

> Could this be related to the definition with inheritance?
> (define-public libjpeg-8
>   (package (inherit libjpeg)
>    (name "libjpeg-8")
> ...

This has to do with how guix-package interprets package names.

As noted in the manual, users can write either =E2=80=9Cguix-package -i gui=
le=E2=80=9D
or =E2=80=9Cguix-package -i guile-2.0.7=E2=80=9D.  In the latter case, guix=
-package
assumes that =E2=80=9C2.0.7=E2=80=9D is a version number, and then searches=
 all packages
whose name is =E2=80=9Cguile=E2=80=9D and whose version is =E2=80=9C2.0.7=
=E2=80=9D.

In your case, it searches for packages named =E2=80=9Clibjpeg=E2=80=9D and =
whose version
number is =E2=80=9C8=E2=80=9D=E2=80=93which fails.

The fix it to not introduce the version number in the =E2=80=98name=E2=80=
=99 field, and
instead leave it in the =E2=80=98version=E2=80=99 field.

HTH,
Ludo=E2=80=99.