Short answer: no—prefect.yaml does not support inline conditionals (if/else). It’s plain YAML with Prefect’s placeholder interpolation, so you can’t do something like “if env == test then use anchor, else null”. What you can do: - Use YAML anchors/aliases to DRY up config, but you must select them explicitly (no conditional activation). - Template values from environment variables using placeholders like

{{ env.MY_VAR }}

. - Define separate deployments per environment (one uses

push: *ecr_push

, another uses

push: null

) and deploy the one you need. - Or drive a boolean via an env var, e.g.

push: "{{ env.PUSH_IMAGE }}"

, then set

PUSH_IMAGE=true

or

false

in your CI/env (note: this is string-substitution; ensure the target field accepts booleans or handle accordingly). Examples - Two deployments:

deployments:
  - name: my-flow-test
    # ...
    push: *ecr_push

  - name: my-flow-dev
    # ...
    push: null

- Environment-driven toggle:

deployments:
  - name: my-flow
    # ...
    push: "{{ env.PUSH_IMAGE }}"

Then set

PUSH_IMAGE=true

(test) or

PUSH_IMAGE=false

(other). If you’re actually referring to a specific “push” step/packager (e.g., pushing a Docker image to ECR), share a snippet of your prefect.yaml and I can show the best pattern for that use case. Docs: - Prefect YAML reference: prefect.yaml - Settings & profiles (to manage env-specific values): Settings and profiles