Release snap to stable without snap tool

I’ve got a snap built that I’d like to put into stable branch, but I can’t run snap because it’s not available for my Linux distribution, NixOS. Is there any way to do the same using online tools, like build.snapcraft.io? I couldn’t find any such button there, and “Don’t have snapd installed?” link only lists ways to install the daemon, not ways to live without it.

There should be options at https://dashboard.snapcraft.io for releasing builds. You don’t need snapd to release, only snapcraft.

Note that, if you end up needing Snapcraft, you can always use the Docker images.

Thank you both! Indeed, if I go to https://dashboard.snapcraft.io, I can select any revision of my snap, click “Release” link next to “Channels”, and select the channel(s) I want to release to. No tool required!