The macports.sqlext is meant to ease debugging the registry database by providing the necessary SQLite extensions to examine and modify the database using the sqlite3 command line tool. To use this SQLite extension, use '.load macports.sqlext' at the sqlite3 prompt right after attaching the registry.db file. Example: $ sqlite3 /opt/local/var/macports/registry/registry.db ... sqlite> .load /Users/julesverne/src/macports/trunk/base/src/cregistry/macports.sqlext