title: pyenv install 3.6.3 error occurring : why?
body: <pre><code>user@syyun:~$ pyenv install 3.6.3
  Downloading Python-3.6.3.tar.xz...
  -&gt; https://www.python.org/ftp/python/3.6.3/Python-3.6.3.tar.xz
  Installing Python-3.6.3...
  
  BUILD FAILED (Ubuntu 16.04 using python-build 1.1.5-8-g7b9d1a4)
  Inspect or clean up the working tree at /tmp/python-build.20171020004725.32507
  Results logged to /tmp/python-build.20171020004725.32507.log
  
  Last 10 log lines:
      ensurepip._main()
    File "/tmp/python-build.20171020004725.32507/Python-3.6.3/Lib/ensurepip/__init__.py", line 189, in _main
      default_pip=args.default_pip,
    File "/tmp/python-build.20171020004725.32507/Python-3.6.3/Lib/ensurepip/__init__.py", line 102, in bootstrap
      _run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
    File "/tmp/python-build.20171020004725.32507/Python-3.6.3/Lib/ensurepip/__init__.py", line 27, in _run_pip
      import pip
  zipimport.ZipImportError: can't decompress data; zlib not available
  Makefile:1079: recipe for target 'install' failed
  make: *** [install] Error 1
  </code></pre>
  
  <p>Can't locate any related google-search record for above given error on pyenv install command.</p>
  
  <p>Any guidance would be appreciate </p>