my-game-macos.o&quot;
                #+win32 &quot;my-game-windows&quot;
                #+(and bsd (not darwin)) &quot;my-game-bsd.run&quot;
                #-(or linux bsd win32) &quot;my-game&quot;
:entry-point &quot;my-game::main&quot;
:defsystem-depends-on (:deploy)</pre></code><p>You can adapt the build pathnames as you wish, as long as the pathname types stay consistent: <code>.run</code> for Linux, <code>.o</code> for MacOS, and none for Windows (<code>.exe</code> is added by default). You can also