Download, build and install package

def choice_install(self):
        """Download, build and install package
        """
        pkg_security([self.name])
        if not find_package(self.prgnam, self.meta.pkg_path):
            self.build()
            self.install()
            delete(self.build_folder)
            raise SystemExit()
        else:
            self.msg.template(78)
            self.msg.pkg_found(self.prgnam)
            self.msg.template(78)
            raise SystemExit()