There's no carbon on the moon.
'Carbon content and degassing history of the lunar volcanic glasses' - https://www.nature.com/articles/ngeo2511
EDIT: This is a perfectly valid reply to the lack of carbon asserted by the parent comment. If it's not there, we put it there. How hard is that to comprehend? Space stations and various materials requisite to the operation of space stations didn't exist in orbit prior to us putting them there.