go_third_party_module
A third-party Go module.
You should not explicitly create this target in BUILD files. Under [golang].third_party_target_granularity = "module", adding a go_mod target generates one go_third_party_module target per third-party module, addressed by the module's import path (its root package). Other packages in the module are compiled on demand when imported; use go_binary's main_import_path field to build a specific package.
Make sure that your go.mod and go.sum files include this module.
Backend: pants.backend.experimental.go