[Python] creating ./config.data failed while compiling Mozilla Firefox

My mozilla compilation is failing while I am compiling with command. I am just using the default code from mozilla.

mach build


with followig error

2:39.43 creating ./config.data
2:46.33
2:53.91
2:54.26 Creating config.status
2:54.26 Traceback (most recent call last):
2:54.26 File "c:/mozilla-source/mozilla-central/configure.py", line 124, in <module>
2:54.26 sys.exit(main(sys.argv))
2:54.26 File "c:/mozilla-source/mozilla-central/configure.py", line 34, in main
2:54.26 return config_status(config)
2:54.26 File "c:/mozilla-source/mozilla-central/configure.py", line 109, in config_status
2:54.26 from mozbuild.config_status import config_status
2:54.26 File "c:\mozilla-source\mozilla-central\python\mozbuild\mozbuild\config_status.py", line 21, in <module>
2:54.26 from mozbuild.base import MachCommandConditions
2:54.26 File "c:\mozilla-source\mozilla-central\python\mozbuild\mozbuild\base.py", line 17, in <module>
2:54.26 from mach.mixin.process import ProcessExecutionMixin
2:54.26 File "c:\mozilla-source\mozilla-central\python\mach\mach\mixin\process.py", line 14, in <module>
2:54.26 from mozprocess.processhandler import ProcessHandlerMixin
2:54.26 ImportError: No module named mozprocess.processhandler
2:54.37 *** Fix above errors and then restart with\
2:54.37 "c:/mozilla-build/mozmake/mozmake.EXE -f client.mk build"
2:54.39 c:/mozilla-source/mozilla-central/client.mk:379: recipe for target 'configure' failed
2:54.39 mozmake.EXE[2]: *** [configure] Error 1
2:54.39 c:/mozilla-source/mozilla-central/client.mk:396: recipe for target 'c:/mozilla-source/mozilla-central/obj-i686-pc-mingw32/Makefile' failed
2:54.39 mozmake.EXE[1]: *** [c:/mozilla-source/mozilla-central/obj-i686-pc-mingw32/Makefile] Error 2
2:54.39 client.mk:170: recipe for target 'build' failed
2:54.39 mozmake.EXE: *** [build] Error 2
2:54.41 0 compiler warnings present.
2


The following line is giving the error

if config.get('MOZ_BUILD_APP') != 'js' or config.get('JS_STANDALONE'):
os.environ[b'WRITE_MOZINFO'] = b'1'
from mozbuild.config_status import config_status


How to fix this one.

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