@cached_property<EOL><INDENT>def variant(self):<DEDENT>
return ["<STR_LIT>" % self.platform,<EOL>"<STR_LIT>" % self.arch,<EOL>"<STR_LIT>" % self.os]<EOL>
Returns a list of the form ["platform-X", "arch-X", "os-X"] suitable
        for use as a variant in a system-dependent package.