Update Makefile

Makefile

@@ -2,11 +2,12 @@ NAME = slu-calendar-gui
 MAIN = slu-calendar.py
 
 DIRNAME = $(NAME:-gui=)
+MODNAME = $(MAIN:.py=)
 PY_FILES += $(wildcard src/*.py)
 
 default: bin ${PY_FILES}
 	@cp ${PY_FILES} bin/${DIRNAME}
-	@echo "#!/bin/bash\nexec /runtime/bin/${DIRNAME}/${MAIN}" > bin/${NAME}
+	@echo "#!/usr/bin/env python\nimport sys\nsys.path.append(sys.path[0]+'/${DIRNAME}')\nfrom ${MODNAME} import main\nif __name__ == '__main__':\n    main()\n" > bin/${NAME}
 	@chmod +x bin/${NAME} bin/${DIRNAME}/${MAIN}
 
 bin: