tce-load -i compiletc freetype-dev libpng-dev python3.6-numpy python3.6-dateutil py3.6tz python3.6-cycler py3.6parsing py3.6gobject-dev gtk3-dev gtk3-gir

https://files.pythonhosted.org/packages/51/fe/84ab101f8ab543d89b6a128326f62adcdafd2781ab8362a737e6ce78eea7/matplotlib-3.1.0.tar.gz

cd matplotlib-3.1.0

cp setup.cfg.template setup.cfg
Edit
tests = False

python3 setup.py build
sudo python3 setup.py install --root=/tmp/pkg

BUILDING MATPLOTLIB
  matplotlib: yes [3.1.0]
      python: yes [3.6.4 (default, Mar  9 2018, 12:22:02)  [GCC 7.2.0]]
    platform: yes [linux]

OPTIONAL SUBPACKAGES
 sample_data: yes [installing]
       tests: no  [skipping due to configuration]

OPTIONAL BACKEND EXTENSIONS
         agg: yes [installing]
       tkagg: yes [installing; run-time loading from Python Tcl/Tk]
      macosx: no  [Mac OS-X only]

OPTIONAL PACKAGE DATA
        dlls: no  [skipping due to configuration]