To allow Guix to download substitutes from
bordeaux.guix.gnu.org or a mirror, you
must add the relevant public key to the access control list (ACL) of archive
imports, using the
guix archive command (see Invoking guix archive). Doing so implies that you trust the substitute server to not
be compromised and to serve genuine substitutes.
Note: If you are using Guix System, you can skip this section: Guix System authorizes substitutes from
The public keys for each of the project maintained substitute servers
are installed along with Guix, in
prefix is the installation prefix of Guix. If you installed Guix
from source, make sure you checked the GPG signature of
guix-7f9a293.tar.gz, which contains this public key file.
Then, you can run something like this:
# guix archive --authorize < prefix/share/guix/ci.guix.gnu.org.pub # guix archive --authorize < prefix/share/guix/bordeaux.guix.gnu.org.pub
Once this is in place, the output of a command like
should change from something like:
$ guix build emacs --dry-run The following derivations would be built: /gnu/store/yr7bnx8xwcayd6j95r2clmkdl1qh688w-emacs-24.3.drv /gnu/store/x8qsh1hlhgjx6cwsjyvybnfv2i37z23w-dbus-1.6.4.tar.gz.drv /gnu/store/1ixwp12fl950d15h2cj11c73733jay0z-alsa-lib-184.108.40.206.tar.bz2.drv /gnu/store/nlma1pw0p603fpfiqy7kn4zm105r5dmw-util-linux-2.21.drv …
to something like:
$ guix build emacs --dry-run 112.3 MB would be downloaded: /gnu/store/pk3n22lbq6ydamyymqkkz7i69wiwjiwi-emacs-24.3 /gnu/store/2ygn4ncnhrpr61rssa6z0d9x22si0va3-libjpeg-8d /gnu/store/71yz6lgx4dazma9dwn2mcjxaah9w77jq-cairo-1.12.16 /gnu/store/7zdhgp0n1518lvfn8mb96sxqfmvqrl7v-libxrender-0.9.7 …
The text changed from “The following derivations would be built” to “112.3 MB would be downloaded”. This indicates that substitutes from the configured substitute servers are usable and will be downloaded, when possible, for future builds.
The substitute mechanism can be disabled globally by running
guix-daemon with --no-substitutes (see Invoking guix-daemon). It can also be disabled temporarily by passing the
--no-substitutes option to
guix build, and other command-line tools.