directory /usr/ports/lang/python27 does not exist

grahamperrin@ ~> cd /usr/ports/www/firefox
���                                                                                     grahamperrin@ /u/p/w/firefox> sudo make rmconfig
Password:
make: "/usr/ports/Mk/Uses/python.mk" line 403: Cannot open /usr/ports/lang/python27/Makefile.version
make: Fatal errors encountered -- cannot continue
make: stopped in /usr/ports/www/firefox
���                                                                                     grahamperrin@ /u/p/w/firefox> cd ../../lang
���                                                                                                                                            grahamperrin@ /u/p/lang> cd python27
cd: The directory ���python27��� does not exist
���                                                                                                                                            grahamperrin@ /u/p/lang>