Meta columns with dashes are not importable

When I try to bulk import or update users and include metadata columns that include dashes in their names, the field names are truncated and do not import correctly.

Example:

@user_email user_login first_name last_name meta:test-field
an@expl.om mylogin myfirst mylast something

The importer will think the final column is for “meta:test” not “meta:test-field”.

Is there a workaround?