module error

python2.7 tools/run_tests/run_tests.py -l=python --compiler=python2.7 --newline_on_success
pyenv-implicit: found multiple python2.7 in pyenv. Use version 2.7-dev.

++ dirname /Users/siddharthshukla/grpc/tools/run_tests/build_python.sh
+ cd /Users/siddharthshukla/grpc/tools/run_tests/../..
++ uname -s
+ PLATFORM=Darwin
+ PYTHON=python2.7
+ VENV=py27
+ VENV_RELATIVE_PYTHON=bin/python
+ TOOLCHAIN=unix
++ pwd
+ ROOT=/Users/siddharthshukla/grpc
+ export 'CFLAGS=-I/Users/siddharthshukla/grpc/include -std=gnu99 -fno-wrapv '
+ CFLAGS='-I/Users/siddharthshukla/grpc/include -std=gnu99 -fno-wrapv '
+ export GRPC_PYTHON_BUILD_WITH_CYTHON=1
+ GRPC_PYTHON_BUILD_WITH_CYTHON=1
+ export LANG=en_US.UTF-8
+ LANG=en_US.UTF-8
+ HOST_PYTHON=python
++ is_linux
++ '[' Darwin '!=' Darwin ']'
++ exit 1
+ '[' ']'
++ is_mingw
++ '[' Darwin '!=' Darwin ']'
++ exit 1
+ '[' ']'
+ python2.7 -m virtualenv py27
New python executable in /Users/siddharthshukla/grpc/py27/bin/python2.7
Not overwriting existing python script /Users/siddharthshukla/grpc/py27/bin/python (you must use /Users/siddharthshukla/grpc/py27/bin/python2.7)
Installing setuptools, pip, wheel...done.
++ script_realpath -s py27/bin/python
+++ command -v realpath
++ '[' -x /usr/local/bin/realpath ']'
++ realpath -s py27/bin/python
+ VENV_PYTHON=/Users/siddharthshukla/grpc/py27/bin/python
+ /Users/siddharthshukla/grpc/py27/bin/python -m pip install --upgrade pip
Requirement already up-to-date: pip in ./py27/lib/python2.7/site-packages
+ /Users/siddharthshukla/grpc/py27/bin/python -m pip install setuptools==25.1.1
Collecting setuptools==25.1.1
  Using cached setuptools-25.1.1-py2.py3-none-any.whl
Installing collected packages: setuptools
  Found existing installation: setuptools 30.2.0
    Uninstalling setuptools-30.2.0:
      Successfully uninstalled setuptools-30.2.0
Successfully installed setuptools-30.0.0
+ /Users/siddharthshukla/grpc/py27/bin/python -m pip install cython
Requirement already satisfied: cython in ./py27/lib/python2.7/site-packages
+ pip_install_dir /Users/siddharthshukla/grpc
++ pwd
+ PWD=/Users/siddharthshukla/grpc
+ cd /Users/siddharthshukla/grpc
+ /Users/siddharthshukla/grpc/py27/bin/python setup.py build_ext -c unix
running build_ext
copying python_build/lib.macosx-10.11-x86_64-2.7/grpc/_cython/cygrpc.so -> src/python/grpcio/grpc/_cython
+ /Users/siddharthshukla/grpc/py27/bin/python -m pip install --upgrade .
Processing /Users/siddharthshukla/grpc
Requirement already up-to-date: six>=1.5.2 in ./py27/lib/python2.7/site-packages (from grpcio==1.0.1)
Requirement already up-to-date: enum34>=1.0.4 in ./py27/lib/python2.7/site-packages (from grpcio==1.0.1)
Requirement already up-to-date: protobuf>=3.0.0 in ./py27/lib/python2.7/site-packages (from grpcio==1.0.1)
Requirement already up-to-date: futures>=2.2.0 in ./py27/lib/python2.7/site-packages (from grpcio==1.0.1)
Collecting setuptools (from protobuf>=3.0.0->grpcio==1.0.1)
  Using cached setuptools-30.2.0-py2.py3-none-any.whl
Installing collected packages: grpcio, setuptools
  Found existing installation: grpcio 1.0.1
    Uninstalling grpcio-1.0.1:
      Successfully uninstalled grpcio-1.0.1
  Running setup.py install for grpcio: started
    Running setup.py install for grpcio: finished with status 'done'
  Found existing installation: setuptools 30.0.0
    Uninstalling setuptools-30.0.0:
      Successfully uninstalled setuptools-30.0.0
  Rolling back uninstall of setuptools
Exception:
Traceback (most recent call last):
  File "/Users/siddharthshukla/grpc/py27/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/Users/siddharthshukla/grpc/py27/lib/python2.7/site-packages/pip/commands/install.py", line 342, in run
    prefix=options.prefix_path,
  File "/Users/siddharthshukla/grpc/py27/lib/python2.7/site-packages/pip/req/req_set.py", line 784, in install
    **kwargs
  File "/Users/siddharthshukla/grpc/py27/lib/python2.7/site-packages/pip/req/req_install.py", line 851, in install
    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
  File "/Users/siddharthshukla/grpc/py27/lib/python2.7/site-packages/pip/req/req_install.py", line 1064, in move_wheel_files
    isolated=self.isolated,
  File "/Users/siddharthshukla/grpc/py27/lib/python2.7/site-packages/pip/wheel.py", line 247, in move_wheel_files
    prefix=prefix,
  File "/Users/siddharthshukla/grpc/py27/lib/python2.7/site-packages/pip/locations.py", line 142, in distutils_scheme
    i = d.get_command_obj('install', create=True)
  File "/Users/siddharthshukla/.pyenv/versions/2.7-dev/lib/python2.7/distutils/dist.py", line 845, in get_command_obj
    klass = self.get_command_class(command)
  File "/Users/siddharthshukla/grpc/py27/lib/python2.7/site-packages/setuptools/dist.py", line 511, in get_command_class
    self.cmdclass[command] = cmdclass = ep.load()
  File "/Users/siddharthshukla/grpc/py27/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2235, in load
    return self.resolve()
  File "/Users/siddharthshukla/grpc/py27/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2241, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
ImportError: No module named command.install
FAILED: /Users/siddharthshukla/grpc/tools/run_tests/build_python.sh [ret=2, pid=512]
FAILED: Some tests failed