Gitlab-ci: extend script section

I have an unity ci-project. .gitlab-ci.yml contains base .build job with one script command. Also I have multiple specified jobs for build each platform which extended base .build. I want to execute some platform-specific commands for android, so I have created separated job generate-android-apk. But if it's failing the pipeline will be failed too.(I know about allow_failure). Is it possible to extend script section between jobs without copy-pasting?

UPDATE:

since gitlab 13.9 it is possible to use !reference tags from other jobs or "templates" (which are commented jobs - using dot as prefix)

actual_job:
  script:
    - echo doing something

.template_job:
  after_script:
    - echo done with something

job_using_references_from_other_jobs:
  script:
    - !reference [actual_job, script]
  after_script:
    - !reference [.template_job, after_script]

Thanks to @amine-zaine for the update

FIRST APPROACH:

You can achieve modular script sections by utilizing 'literal blocks' (using |) like so:

.template1: &template1 |
  echo install

.template2: &template2 |
  echo bundle

testJob:
  script:
  - *template1
  - *template2

See Source

ANOTHER SOLUTION:

Since GitLab 11.3 it is possible to use extend which could also work for you.

.template:
  script: echo test template
  stage: testStage
  only:
    refs:
      - branches

rspec:
  extends: .template1
  after_script:
    - echo test job
  only:
    variables:
      - $TestVar

See Docs More Examples