Build.snapcraft.io and long build times


#1

As reported in this bugreport, build.snapcraft.io fails to build very big snaps like our Liri platform snap because the proxy token life time for launchpad-buildd is limited.
Here’s a recent build log: https://build.snapcraft.io/user/lirios/platform-snap/89158

...
OSError: Tunnel connection failed: 407 Proxy Authentication Required
...

Is there any way to workaround this issue or to extend the lifetime, even if just for a specific snap package?
If not, are there alternatives for big snaps like this one? All online services that come to my mind have build time restriction or cost money.
It is of course absolutely fair to say build.snapcraft.io is not supporting such long build times because of the server load we’re not even paying for. If so, it would be nice to document that somewhere, though.
Thanks for any help or advice, this is really a major blocker for us to provide snap packages.