I have had to use the nohash option for this exact reason. Be warned though, the amount of files downloaded to the endpoint is going to be in the region of 5GB as the fixlet uses prefetch so both x86 and x64 files will be prefetched before the actions runs.
I have submittted an ideas suggestion to change that behaviour if you would like to upvote it 
Votes to modifiy how Office 365 content is downloaded by fixlets