Are single file volumes not possible in drone?

Drone Support
1

This produces an error saying /etc/config.ini is a directory. Are single file volumes not possible?

kind: pipeline
type: docker
name: default

steps:

- name: test
  image: alpine
  commands:
  - echo "test" >> /etc/config.ini
  - cat /etc/config.ini
  volumes:
  - name: config
    path: /etc/config.ini

volumes:
- name: config
  temp: {}
2

temporary volumes are always created as directories, however, host machine volumes support mounting files.