efficient enough and sets the times out much too high Reply-To: In-Reply-To: When you configure a system to use bayfront, for example with these lines included in cons* of (services): (modify-services %base-services (guix-service-type config => (guix-configuration (inherit config) (substitute-urls (cons* "https://bayfront.guixsd.org" %default-substitute-urls)) (authorized-keys (cons* (plain-file "bayfront.guixsd.org.pub" (string-append "(public-key (ecc curve Ed25519) " "(q #8D156F295D24B0D9A86FA5741A840FF2" "D24F60F7B6C4134814AD55625971B394#)))")) %default-authorized-guix-keys)))))))) please consider that this does not reflect the actual indent and that I can't paste all of the config here, but those are the relevant parts, you will experience that: "guix package", and "guix system" (or guix buld?) query all listed subsitute urls, while "guix pull" only queries the first one. If the first one is experiencing issues (for example server is offline or can't handle requests for whatever reasons), the timeout is much too high. I had to cancel guix pull processes which tried to request from bayfront.guixsd.org for 9, 12, and 3 hours. As bayfront wasn't the only server, a switch should occur even with the guix pull part where substitute servers are queried before the build of the fetched master tarball starts.