services.gitlab-runner.services.<name>.registrationConfigFile

Absolute path to a file with environment variables used for gitlab-runner registration. A list of all supported environment variables can be found in gitlab-runner register --help.

Ones that you probably want to set is

CI_SERVER_URL=<CI server URL>

REGISTRATION_TOKEN=<registration secret>

Type
absolute path
Declared
<nix-darwin/modules/services/gitlab-runner.nix>