PyEnv BUILD FAILED installing Python on MacOS

Question

While trying to install Python 3.6.6 (for Airflow) using PyEnv on MacOS, I am encountering build failure

Answer 1

BUILD FAILED (OS X 10.14.3 using python-build 20180424)

Inspect or clean up the working tree at /var/folders/kt/79hj2dxs5vg7gsy188n6tk9c0000gn/T/python-build.20190226112205.71745
Results logged to /var/folders/kt/79hj2dxs5vg7gsy188n6tk9c0000gn/T/python-build.20190226112205.71745.log

Last 10 log lines:
  File "/private/var/folders/kt/79hj2dxs5vg7gsy188n6tk9c0000gn/T/python-build.20190226112205.71745/Python-3.6.6/Lib/ensurepip/__main__.py", line 5, in 
    sys.exit(ensurepip._main())
  File "/private/var/folders/kt/79hj2dxs5vg7gsy188n6tk9c0000gn/T/python-build.20190226112205.71745/Python-3.6.6/Lib/ensurepip/__init__.py", line 204, in _main
    default_pip=args.default_pip,
  File "/private/var/folders/kt/79hj2dxs5vg7gsy188n6tk9c0000gn/T/python-build.20190226112205.71745/Python-3.6.6/Lib/ensurepip/__init__.py", line 117, in _bootstrap
    return _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
  File "/private/var/folders/kt/79hj2dxs5vg7gsy188n6tk9c0000gn/T/python-build.20190226112205.71745/Python-3.6.6/Lib/ensurepip/__init__.py", line 27, in _run_pip
    import pip._internal

I found the solution from http://digidememory.blogspot.com/2019/01/macos-mojave-10142python371.html

In my case, I solved by this command

sudo installer -pkg /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg -target /