From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marco van Zwetselaar <zwets@zwets.com>
Subject: Passing substitute-urls via GUIX_BUILD_OPTIONS
Date: Mon, 12 Feb 2018 13:53:49 +0300
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To: guix-devel@gnu.org

All,

Is there a magic escape to allow passing --substitute-urls via
GUIX_BUILD_OPTIONS?

$ GUIX_BUILD_OPTIONS=3D"--substitute-urls=3Dhttp://server1
https://mirror.hydra.gnu.org" guix package -I
guix package: error: https://mirror.hydra.gnu.org: extraneous argument
$ GUIX_BUILD_OPTIONS=3D"--substitute-urls=3D'http://server1
https://mirror.hydra.gnu.org'" guix package -I
guix package: error: https://mirror.hydra.gnu.org': extraneous argument
$ GUIX_BUILD_OPTIONS=3D'--substitute-urls=3D"http://server1
https://mirror.hydra.gnu.org"' guix package -I
guix package: error: https://mirror.hydra.gnu.org": extraneous argument
$ ... other attempts involving apostrophes, quotes, and backslashes ...

I can't seem to find the incantation that works.

Cheers,
Marco