(5551_2)]$ ./pants setup-py --run="--python-tag cp27 --plat-name macosx_10_12_x86_64" //src/python/pants:pants-packaged

14:51:53 00:00 [main]
               See a report at: <http://localhost:58148/run/pants_run_2018_10_25_14_51_54_164_53a107ab837c428695f4c665d81f70f7>
14:51:54 00:01   [setup]
14:51:59 00:06     [parse]
               Executing tasks in goals: native-compile -> bootstrap -> imports -> unpack-jars -> deferred-sources -> link -> gen -> pyprep -> setup-py
...
14:52:01 00:08   [pyprep]
14:52:01 00:08     [interpreter]
14:52:01 00:08     [build-local-dists]
14:52:01 00:08     [requirements]
14:52:01 00:08     [sources]
14:52:01 00:08   [setup-py]
14:52:01 00:08     [setup-py]
                   Creating setup.py project for PythonLibrary(BuildFileAddress(src/python/pants/BUILD, pants-packaged))
14:52:17 00:24       [find-namespace-packages]
                   Running --python-tag cp27 --plat-name macosx_10_12_x86_64 against /Users/yic/workspace/pants/dist/pantsbuild.pants-1.11.0rc0**** Failed to install pantsbuild.pants-1.11.0rc0 (caused by: NonZeroExit("received exit code 1 during execution of `[u'/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7', '-', '--python-tag', 'cp27', '--plat-name', 'macosx_10_12_x86_64']` while trying to execute `[u'/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7', '-', '--python-tag', 'cp27', '--plat-name', 'macosx_10_12_x86_64']`",)
):
stdout:

stderr:
usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
   or: setup.py --help [cmd1 cmd2 ...]
   or: setup.py --help-commands
   or: setup.py cmd --help

error: option --python-tag not recognized



               Waiting for background workers to finish.
14:52:18 00:25   [complete]
               SUCCESS