From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Package version at build side
Date: Tue, 04 Nov 2014 22:45:43 +0100
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References: <20141104193524.GA5700@debian>
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To: Andreas Enge <andreas@enge.fr>
Cc: guix-devel@gnu.org

Andreas Enge <andreas@enge.fr> skribis:

> for kdelibs, I need to pass the version of the input docbook-xsl as
> a configure flag. So I added something like
>
>        #:configure-flags
>         (list "-DCMAKE_VERBOSE_MAKEFILE=3DON" ; for debugging
>               (let ((docbook-xsl (assoc-ref %build-inputs "docbook-xsl")))
>                 (string-append "-DDOCBOOKXSL_DIR=3D"
>                                docbook-xsl
>                                "/xml/xsl/docbook-xsl-"
>                                (package-version docbook-xsl)
                                 ^
Missing unquote (comma) here.  --=E2=80=99
See gps.scm for an example.

> Now package-version seems to be defined in (guix package); when I add thi=
s as
> modules, more and more of them are pulled in. Currently I have
>
>        #:modules ((guix packages) ; for PACKAGE-VERSION
>                   (guix base32)
>                   (guix config)
>                   (guix derivations)
>                   (guix records)
>                   (guix serialization)
>                   (guix store)
>                   (guix utils)
>                   (guix build syscalls)
>                   (guix build utils))

The raison d=E2=80=99=C3=AAtre of the (guix build =E2=80=A6) name space is =
precisely to
distinguish modules to be used on the build side from modules to be used
on the host side (info "(guix) G-Expressions").  The above approach is
not going to work, because it tries to import purely host code on the
build side.

Thanks,
Ludo=E2=80=99.