Extends with rules

Hi all!

I’m faced with an issue I’m not able to solve.
So I want to move a part of a configuration in a separate file to use across the jobs.
Here is it:

.base_only:
  rules:
    - if: '$CI_COMMIT_BEFORE_SHA == "0000000000000000000000000000000000000000"'
      when: never
    - if: $CI_COMMIT_TAG
    - if: $CI_COMMIT_BRANCH
    - when: never

There I define basic rules for a job run.
Next, I want to use it within a job with its own when: manual rule.
I can’t use it on a job level - I’m getting an error from lint saying when can’t be used there.
This does not work:

test-one:
  extends:
    - .base_only
  stage: build
  script: echo "Test one";false
  when: manual

When I use rules within job too the most recent rules is used:

test-one:
  extends:
    - .base_only
  stage: build
  script: echo "Test one";false
  rules:
    - when: manual

So after merge, I just want to get the job with following definition:

test-one:
  stage: build
  script: echo "Test one";false
  rules:
    - if: $CI_COMMIT_REF_NAME =~ /^release.*$/i
      when: manual
    - if: $CI_COMMIT_REF_NAME =~ /^hotfix.*$/i
      when: manual
    - if: $CI_COMMIT_TAG
      when: manual
    - when: never

Is it possible? Or there are no possibilities to merge rules?