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
guix archive). Doing so implies that you trust the
substitute server to not be compromised and to serve genuine substitutes.
Nota: 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-1.4.0.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
guix build 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-22.214.171.124.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 Invocando
guix-daemon). It can also be disabled temporarily by passing the
--no-substitutes option to
build, and other command-line tools.