'environment software-specification get' doesn't work as described

[rolweber]

The documentation says it can be invoked without space id and project id.
environment software-specification get

Specify either space_id or project_id, or none of them.

But when I try "none of them", I get the same error message as from other calls that require one of them:
cpdctl environment software-specification get --software-specification-id 45f12dfe-aa78-5b8d-9f38-0ee223c47309 --output json

FAILED
Error executing command:
neither flag(s) "space-id", "project-id", "cpd-scope" nor "CPD_SCOPE" environment variable set