(clean_env) C:\Users\rbao>pip install matplotlib==2.2.4
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Ple
ase upgrade your Python as Python 2.7 won't be maintained after that date. A fut
ure version of pip will drop support for Python 2.7.
Looking in indexes: https://pypi.org/simple, http://nz-lnx-01/pypi
Collecting matplotlib==2.2.4
  Using cached https://files.pythonhosted.org/packages/1e/20/2032ad99f0dfe0f6097
0941af36e8d0942d3713f442bb3df37ac35d67358/matplotlib-2.2.4.tar.gz
    Complete output from command python setup.py egg_info:
    ============================================================================

    Edit setup.cfg to change the build options

    BUILDING MATPLOTLIB
                matplotlib: yes [2.2.4]
                    python: yes [2.7.15 (v2.7.15:ca079a3ea3, Apr 30 2018,
                            16:22:17) [MSC v.1500 32 bit (Intel)]]
                  platform: yes [win32]

    REQUIRED DEPENDENCIES AND EXTENSIONS
                     numpy: yes [not found. pip may install it below.]
          install_requires: yes [handled by setuptools]
                    libagg: yes [pkg-config information for 'libagg' could not
                            be found. Using local copy.]
                  freetype: no  [The C/C++ header for freetype
                            (freetype2\ft2build.h) could not be found.  You may
                            need to install the development package.]
                       png: no  [The C/C++ header for png (png.h) could not be
                            found.  You may need to install the development
                            package.]
                     qhull: yes [pkg-config information for 'libqhull' could not

                            be found. Using local copy.]

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

    OPTIONAL BACKEND EXTENSIONS
                    macosx: no  [Mac OS-X only]
                    qt5agg: no  [PySide2 not found; PyQt5 not found]
                    qt4agg: no  [PySide not found; PyQt4 not found]
                   gtk3agg: no  [Requires pygobject to be installed.]
                 gtk3cairo: no  [Requires cairocffi or pycairo to be installed.]

                    gtkagg: no  [Requires pygtk]
                     tkagg: yes [installing; run-time loading from Python Tcl /
                            Tk]
                     wxagg: no  [requires wxPython]
                       gtk: no  [Requires pygtk]
                       agg: yes [installing]
                     cairo: no  [cairocffi or pycairo not found]
                 windowing: yes [installing]

    OPTIONAL LATEX DEPENDENCIES
                    dvipng: no
               ghostscript: no
                     latex: no
                   pdftops: no

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

    ============================================================================

                            * The following required packages can not be built:
                            * freetype, png
                            * Please check http://gnuwin32.sourceforge.net/packa

                            * ges/freetype.htm for instructions to install
                            * freetype
                            * Please check http://gnuwin32.sourceforge.net/packa

                            * ges/libpng.htm for instructions to install png

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in c:\users\rbao\app
data\local\temp\pip-install-5wv7sa\matplotlib\