Upgrading NixOS Channels️

Upgrading NixOS so that it uses a different channel is simple.

When you run the following command as root:

You should see a list of channels. If you did not touch channels so far, you should see this:

By running the following command (as root):

you will remove the 21.05 channel and replace it with <channel version>.

To apply the change, you need to run the following command:

which is going to rebuild your system with your current configuration and updated packages from the channel you switched to.