Thank you.  Now patching to version b1.8.1
Traceback (most recent call last):
  File "MCNostalgia2.0.1.py", line 28, in <module>
    if mcn.patchTo(version) :
  File "/home/alex/Downloads/MCNostalgia/mcnostalgialib.py", line 28, in patchTo
    self.patch(os.path.join(self.origdir, filename+".jar"), os.path.join(self.outputdir, filename+".jar"), os.path.join(self.patchdir, mcversion, filename+".ptch"))
  File "/home/alex/Downloads/MCNostalgia/mcnostalgialib.py", line 24, in patch
    subprocess.call([self.execute, origfile, outputfile, patchfile])
  File "/usr/lib/python2.7/subprocess.py", line 486, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 672, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1213, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory