Install customized frappe

Hi,
At the time of install frappe(customized)
it gives following error

Already using interpreter /home/jjsbcp/Documents/workspace/helpdesk/bin/python2
        Traceback (most recent call last):
          File "/home/jjsbcp/Documents/workspace/helpdesk/bin/virtualenv", line 11, in <module>
            sys.exit(main())
          File "/home/jjsbcp/Documents/workspace/helpdesk/local/lib/python2.7/site-packages/virtualenv.py", line 713, in main
            symlink=options.symlink)
          File "/home/jjsbcp/Documents/workspace/helpdesk/local/lib/python2.7/site-packages/virtualenv.py", line 945, in create_environment
            download=download,
          File "/home/jjsbcp/Documents/workspace/helpdesk/local/lib/python2.7/site-packages/virtualenv.py", line 901, in install_wheel
            call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
          File "/home/jjsbcp/Documents/workspace/helpdesk/local/lib/python2.7/site-packages/virtualenv.py", line 797, in call_subprocess
            % (cmd_desc, proc.returncode))
        OSError: Command /home/jjsbcp/Documen...ench/env/bin/python2 - setuptools pip wheel failed with error code 2
        Traceback (most recent call last):
          File "/home/jjsbcp/Documents/workspace/helpdesk/bin/bench", line 9, in <module>
            load_entry_point('bench==4.1.0', 'console_scripts', 'bench')()
          File "/home/jjsbcp/Documents/workspace/helpdesk/bench-repo/bench/cli.py", line 40, in cli
            bench_command()
          File "/home/jjsbcp/Documents/workspace/helpdesk/local/lib/python2.7/site-packages/click/core.py", line 716, in __call__
            return self.main(*args, **kwargs)
          File "/home/jjsbcp/Documents/workspace/helpdesk/local/lib/python2.7/site-packages/click/core.py", line 696, in main
            rv = self.invoke(ctx)
          File "/home/jjsbcp/Documents/workspace/helpdesk/local/lib/python2.7/site-packages/click/core.py", line 1060, in invoke
            return _process_result(sub_ctx.command.invoke(sub_ctx))
          File "/home/jjsbcp/Documents/workspace/helpdesk/local/lib/python2.7/site-packages/click/core.py", line 889, in invoke
            return ctx.invoke(self.callback, **ctx.params)
          File "/home/jjsbcp/Documents/workspace/helpdesk/local/lib/python2.7/site-packages/click/core.py", line 534, in invoke
            return callback(*args, **kwargs)
          File "/home/jjsbcp/Documents/workspace/helpdesk/bench-repo/bench/commands/make.py", line 19, in init
            verbose=verbose, clone_from=clone_from)
          File "/home/jjsbcp/Documents/workspace/helpdesk/bench-repo/bench/utils.py", line 46, in init
            setup_env(bench_path=path)
          File "/home/jjsbcp/Documents/workspace/helpdesk/bench-repo/bench/utils.py", line 130, in setup_env
            exec_cmd('virtualenv -q {} -p {}'.format('env', sys.executable), cwd=bench_path)
          File "/home/jjsbcp/Documents/workspace/helpdesk/bench-repo/bench/utils.py", line 127, in exec_cmd
            raise CommandFailedError(cmd)
        bench.utils.CommandFailedError: virtualenv -q env -p /home/jjsbcp/Documents/workspace/helpdesk/bin/python2

Thanks