when connecting to github for a prefect deployment, I dont see all of the options for how to install requirements. Is this allowed?

pull:
- prefect.deployments.steps.git_clone:
    id: clone-step
    repository: <https://github.com/MyTeam/my-repo>
    branch: main
    credentials: "{{ prefect.blocks.github-credentials.my-lock }}"
- prefect.deployments.steps.pip_install_requirements:
    directory: "{{ clone-step.directory }}/project1"
    requirements_file: pyproject.toml

specifically, using a pyproject.toml here? If not, is there another option? And how would I specify any optional dependencies?