def METHOD_NAME(self):
    os = "abcde"
    A_spec = self.A_spec 
    alpha_spec = GppkgSpec("alpha", "1.0", GPDB_VERSION, os)
    gppkg_file = self.build(alpha_spec, A_spec) 
    with self.assertRaisesRegex(ExecutionError , "%s OS required. %s OS found" % (os, OS)):
        self.install(gppkg_file)