govcms8-8.x-1.0-alpha7/themes/custom/govcms8_install/govcmsinstall.libraries.yml

maintenance-page:
  version: VERSION
  css:
    theme:
      css/theme/maintenance-page.css: {}
  dependencies:
    - system/maintenance
    - seven/global-styling

install-page:
  version: VERSION
  css:
    theme:
      css/theme/install-page.css: {}
  dependencies:
    - seven/maintenance-page