def pluginPackagePaths(name):
package = name.split('<STR_LIT:.>')<EOL>return [<EOL>os.path.abspath(os.path.join(x, *package))<EOL>for x<EOL>in sys.path<EOL>if<EOL>not os.path.exists(os.path.join(x, *package + ['<STR_LIT>']))]<EOL>
Return a list of additional directories which should be searched for
modules to be included as part of the named plugin package.

@type name: C{str}
@param name: The fully-qualified Python name of a plugin package, eg
    C{'twisted.plugins'}.

@rtype: C{list} of C{str}
@return: The absolute paths to other directories which may contain plugin
    modules for the named plugin package.