Is is possible to wire an os signal like sigterm using v2?

[pkovacs]

I see it is possible with cli.Command in v3, but altcli v3 is too unstable right now. Or, is it possible to use cli v3 with altcli v2? I am able to set up the following precedence with v2:

1. use the flag on the cli
2. use the indicated env var
3. use the value from the config file

I want to handle signals using the context mechanism of v3 but that seems to imply using altcli v3 which is unstable -- I cannot get it to build, let alone do the above. Is it possible to use signals in v2?