Attiny 13A bootloader flashing: avrdude: Can't find programmer id "micronucleus"

I'm trying to flash a bottloader to the ATTINY13A using this tutorial:

When i click "burn bootloader" i get this Error message:
avrdude: Can't find programmer id "micronucleus"
(Whole message is here: Arduino: 1.8.1 (Linux), TD: 1.37, Board: "ATtiny13, ATtiny13, No (ISP Programmer - Pastebin.com)
Im using a linux system.
Does anybody know what to do now ?

What do you have selected in the Tools > Programmer menu?