As reported by mange on #guix, it seems that ‘guix substitute’ does not
Toggle snippet (37 lines)
$ guix weather icecat emacs --substitute-urls=https://ci.guix.gnu.org
computing 2 package derivations for x86_64-linux...
looking for 2 store items on https://ci.guix.gnu.org...
updating substitutes from 'https://ci.guix.gnu.org'... 100.0%
https://ci.guix.gnu.org
100.0% substitutes available (2 out of 2)
at least 201.3 MiB of nars (compressed)
293.5 MiB on disk (uncompressed)
0.084 seconds per request (0.2 seconds in total)
11.9 requests per second
at least 1,000 queued builds
x86_64-linux: 368 (36.8%)
i686-linux: 556 (55.6%)
armhf-linux: 6 (.6%)
aarch64-linux: 69 (6.9%)
i586-gnu: 1 (.1%)
build rate: 154.41 builds per hour
i686-linux: 40.77 builds per hour
x86_64-linux: 37.06 builds per hour
armhf-linux: 40.30 builds per hour
aarch64-linux: 35.83 builds per hour
i586-gnu: 0.55 builds per hour
$ guix weather icecat emacs --substitute-urls=https://ci.guix.info
computing 2 package derivations for x86_64-linux...
looking for 2 store items on https://ci.guix.info...
updating substitutes from 'https://ci.guix.info'... 100.0%
https://ci.guix.info
0.0% substitutes available (0 out of 2)
unknown substitute sizes
0.0 MiB on disk (uncompressed)
0.069 seconds per request (0.1 seconds in total)
14.4 requests per second
ni sekvas la redirektigon al 'https://ci.guix.gnu.org/api/queue'...
'https://ci.guix.gnu.org/api/queue' returned 500 ("Internal Server Error")
(*.guix.info were turned into HTTP redirects a few days ago, see