You don't.
You replace at the roadside and repair at home. Same as butyl for me.
That's the ideal scenario and usual one. However, if get a particularly bad day and get multiple punctures then it's not unknown to have to repair roadside. I've done it with butyl using the instant patches.
Seeing as I'm currently running with TPU then I'd like to have same back up. The tubes I have came with patches so it's just question of has anyone done it and how successful was it.
I carry two spare tubes so in most cases "should" be ok.