ATtiny85 - report error "Device reports version as: 2.2"
It sounds like you have a newer board than the version of Micronucleus in the Arduino package.

As I discovered here you basically need to upgrade micronucleus in your Ardino installation, which you can download from here


Download the zip file from Github and extract it.  Then in a terminal (if you're not already in one) go to the directory you extracted.
Build the executable by typing "make"
Copy the compiled executable to ~/.arduino15/packages/digistump/tools/micronucleus/&lt;version&gt;/


where &lt;version&gt; is the currently installed version number (e.g., 2.0a4).  There should already be a micronucleus executable in there that you would replace with your newly compiled one.