mbs install fixes

mbs/.package

@@ -9,10 +9,14 @@ MBS is a series of utilities for improving the default CraftOS experience.
 	]],
 	license = 'MIT',
 	install = [[
-		require('opus.alternate').set('shell', '.mbs/bin/shell.lua')
+		local Alt = require('opus.alternate')
+		Alt.set('shell', '.mbs/bin/shell.lua')
+		Alt.add('lua', '.mbs/bin/lua.lua')
 	]],
 	uninstall = [[
-		require('opus.alternate').remove('shell', '.mbs/bin/shell.lua')
+		local Alt = require('opus.alternate')
+		Alt.remove('shell', '.mbs/bin/shell.lua')
+		Alt.remove('lua', '.mbs/bin/lua.lua')
 		fs.delete('.mbs')
 	]],
 }