使用python eclipse给设备安装modbus_tk包遇到问题？这是什么原因呢？求大神协助！

环境：win7安装的python2.7.10,  路由器的型号是IR915L  TL-01-W-S 固件版本为1.0.0.r9276    SDK版本 为 1.3.1 网络使用WiFi和SIM卡都试过， 卸载里面的程序包也不行。。。。      这是报错信息：Collecting modbus_tk==0.5.4   Using cached modbus_tk0.5.4.tar.gz Collecting pyserial==3.1 (from modbus_tk==0.5.4)   Using cached pyserial3.1py2.py3noneany.whl Installing collected packages: pyserial, modbustk 31mException:Traceback (most recent call last):  File "varpycorelibpython2.7sitepackagespip8.1.2py2.7.eggpipbasecommand.py", line 215, in main    status = self.run(options, args)  File "varpycorelibpython2.7sitepackagespip8.1.2py2.7.eggpipcommandsinstall.py", line 317, in run    prefix=options.prefix_path,  File "varpycorelibpython2.7sitepackagespip8.1.2py2.7.eggpipreqreq_set.py", line 742, in install    **kwargs  File "varpycorelibpython2.7sitepackagespip8.1.2py2.7.eggpipreqreq_install.py", line 831, in install    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)  File "varpycorelibpython2.7sitepackagespip8.1.2py2.7.eggpipreqreq_install.py", line 1032, in move_wheel_files    isolated=self.isolated,  File "varpycorelibpython2.7sitepackagespip8.1.2py2.7.eggpipwheel.py", line 346, in move_wheel_files    clobber(source, lib_dir, True)  File "varpycorelibpython2.7sitepackagespip8.1.2py2.7.eggpipwheel.py", line 287, in clobber    ensure_dir(dest)  # common for the 'include' path  File "varpycorelibpython2.7sitepackagespip8.1.2py2.7.eggpiputils__init__.py", line 83, in ensure_dir    os.makedirs(path)  File "varpycorelibpython27.zipos.py", line 150, in makedirs    makedirs(head, mode)  File "varpycorelibpython27.zipos.py", line 150, in makedirs    makedirs(head, mode)  File "varpycorelibpython27.zipos.py", line 157, in makedirs    mkdir(name, mode)OSError: Errno 30] Readonly file system: 'mntsdlib'0m