From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: How do I make a manifest file that installs a specific version of
	a dependency?
Date: Sun, 12 Mar 2017 22:50:37 +0100
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References: <CAFXT+ROh_LJL=avnMKvxdDxu1u7h67_hFiaaHA2DMu_8pZe4BA@mail.gmail.com>
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	(Zachary Kanfer's message of "Sun, 12 Mar 2017 00:55:01 -0500")
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To: Zachary Kanfer <zkanfer@gmail.com>
Cc: help-guix@gnu.org

Hello,

Zachary Kanfer <zkanfer@gmail.com> skribis:

> Running `guix package -m` on a file with this line `(list icedtea-2.6
> "jdk")` gives an error "In procedure module-lookup: Unbound variable:
> icedtea-2.6".
>
> I get the same error for the following lines:
>
> `(list icedtea-2.6.6 "jdk")`
> `(list icedtea@2.6.6 "jdk")`
>
> `guix package -s icedtea` reports that there is a version 2.6.6. How do I
> specify this in a manifest file? Thanks.

You should use =E2=80=98specification->package=E2=80=99 as discussed at
<https://www.gnu.org/software/guix/manual/html_node/Using-the-Configuration=
-System.html#index-specification_002d_003epackage>.

The =E2=80=98specification->package=E2=80=99 procedure takes a spec like th=
ose you=E2=80=99d
write on the =E2=80=98guix package -i=E2=80=99 command line, and returns the
corresponding package.  =E2=80=98specification->package+output=E2=80=99 wor=
ks similarly
but also returns the specified output (the part that comes after the
colon).

So your manifest would look something like:

  (use-modules (gnu))

  (packages->manifest
   (map (compose list specification->package+output)
        '("icedtea@2.6.6:jdk" "emacs" "vim" =E2=80=A6)))

HTH!

Ludo=E2=80=99.