Installation crashes Octopi on RPi

[lensdigital]

I ran "/home/pi/oprint/bin/pip install matplotlib numpy " successfully on my RPi 3.
When I tried to install plugin it still tries to get matplotlib-2.2.4.tar.gz and at this point Octoprint server crashes...

Here's what I see in the log:

2019-03-09 20:07:00,106 /home/pi/OctoPrint/venv/bin/python -m pip install https://github.com/PrusaOwners/OctoPrint-PrusaMeshMap/archive/master.zip --no-cache-dir
2019-03-09 20:07:06,141 > Collecting https://github.com/PrusaOwners/OctoPrint-PrusaMeshMap/archive/master.zip
2019-03-09 20:07:07,144 > Downloading https://github.com/PrusaOwners/OctoPrint-PrusaMeshMap/archive/master.zip
2019-03-09 20:07:10,362 > Requirement already satisfied: OctoPrint in /home/pi/OctoPrint/venv/lib/python2.7/site-packages (from OctoPrint-PrusaMeshMap==0.3.0)
2019-03-09 20:07:11,365 > Collecting matplotlib>=2.2.0 (from OctoPrint-PrusaMeshMap==0.3.0)
2019-03-09 20:07:15,370 > Downloading https://files.pythonhosted.org/packages/1e/20/2032ad99f0dfe0f60970941af36e8d0942d3713f442bb3df37ac35d67358/matplotlib-2.2.4.tar.gz (37.0MB)

I'm running OctoPrint 1.3.10
It looks like I already have matplotlib installed:

matplotlib.version
'2.2.4'

[lensdigital]

Actually it eventually finished installing... So "Pre-installing" didn't seem to help, however plugin got installed after about an hour.