Building runtime-only pgAdmin4

   I want to build pgAdmin4 runtime only; no browser interface, but ...
  When I built the executable following the directions for the runtime
version and invoked pgAdmin4 it displays a dialog box asking for the python
and application paths:

$ pgAdmin4 
Python path:  "/usr/bin/python2"
Python Home:  ""
Webapp path:  "/usr/local/bin/pgAdmin4.py"
Traceback (most recent call last):  File "/usr/local/bin/pgAdmin4.py", line 23, in <module>    import config
ImportError: No module named config
"Failed to launch the application server, server thread exiting."
  Installed here are: python-2.7.13, python3-3.6.0, and python3-PyQt5-5.6.
  I would appreciate advice on how to successfully build a runtime-only
pgAdmin4.

TIA,

Rich