--- file \this\path\gui\skills_gui.pm --
package skills_gui;
...
----------------------------------------
--- file \this\path\db\skills_db.pm --
package skills_db;
...
---------------------------------------=

--- file \that\path\gui\skills_gui.pm --
package skills_gui;
...
----------------------------------------
--- file \that\path\db\skills_db.pm --
package skills_db;
...
---------------------------------------=