docs: def run(self):
          """Compile libfaketime."""
          if sys.platform == "linux" or sys.platform == "linux2":
              libname = 'libfaketime.so.1'
              libnamemt = 'libfaketimeMT.so.1'
          elif sys.platform == "darwin":
              libname = 'libfaketime.1.dylib'
              libnamemt = 'libfaketimeMT.1.dylib'
          else:
              sys.stderr.write("WARNING : libfaketime does not support platform {}\n".format(sys.platform))
              sys.stderr.flush()
              return
  
          faketime_lib = join('faketime', libname)
          faketime_lib_mt = join('faketime', libnamemt)
          self.my_outputs = []
  
          setup_py_directory = dirname(realpath(__file__))
          faketime_directory = join(setup_py_directory, "faketime")
          os.chdir(faketime_directory)
          if sys.platform == "linux" or sys.platform == "linux2":
              subprocess.check_call(['make',])
          else:
              os.chdir(setup_py_directory)
              if "10.12" in subprocess.check_output(["sw_vers", "-productVersion"]).decode('utf8'):
                  self.copy_file(
                      join('faketime', "libfaketime.c.sierra"),
                      join('faketime', "libfaketime.c")
                  )
  
              os.chdir(faketime_directory)
              subprocess.check_call(['make', '-f', 'Makefile.OSX'])
          os.chdir(setup_py_directory)
  
          dest = join(self.install_purelib, dirname(faketime_lib))
          dest_mt = join(self.install_purelib, dirname(faketime_lib_mt))
  
          try:
              os.makedirs(dest)
          except OSError as e:
              if e.errno != 17:
                  raise
          self.copy_file(faketime_lib, dest)
  
          if exists(faketime_lib_mt):
              self.copy_file(faketime_lib_mt, dest_mt)
          self.my_outputs.append(join(dest, libname))
  
          install.run(self)