### Bug Description With `rockcraft.yaml` below, `ROCKCRAFE_ENABLE_EXPERIMENTAL_EXTENSIONS=true rockcraft pack` command which guided by official documents([1](https://documentation.ubuntu.com/rockcraft/en/stable/tutorial/fastapi/), [2](https://documentation.ubuntu.com/rockcraft/en/latest/reference/extensions/fastapi-framework/)) not worked as expected. Requires 'prime' entry under 'parts' > 'fastapi-framework/install-app', but `rockcraft.yaml` already has. ### To Reproduce 1. Clone repository with this command in Multipass VM `git clone https://github.com/GDGoC-SCHU/Travia_BE` 2. `cd Travia_BE` 3. Init rockcraft file with `rockcraft init --profile fastapi-framework` 4. Edit `rockcraft.yaml` file like below. 5. Run `ROCKCRAFE_ENABLE_EXPERIMENTAL_EXTENSIONS=true rockcraft pack` script and get error message from rockcraft. ```bash *EXPERIMENTAL* extension 'fastapi-framework' enabled fastapi-framework extension requires the 'prime' entry in the fastapi-framework/install-app part to start with app/ For more information, check out: https://documentation.ubuntu.com/rockcraft/en/latest/reference/extensions/fastapi-framework ``` ### Environment - Running in Multipass VM - Guest OS: Ubuntu 24.04 LTS - Host OS: Kubuntu 24.10 - rockcraft : 1.11.0.post4+g22d0b2a (installed using snap) ### rockcraft.yaml ```yaml name: travia-be base: ubuntu@24.04 version: 0.1 summary: AI-based travel scheduler description: Google Gemini based AI travel scheduler with Google Solutions Challenge platforms: amd64: arm64: extensions: - fastapi-framework parts: fastapi-framework/dependencies: stage-packages: - mariadb-server fastapi-framework/install-app: prime: - .env - app/app.py - app/api/v1/endpoints - app/crud - app/db - app/models - app/schemas - app/services - gemini_api ``` ### Relevant log output ```shell Log not saved, but can get some error output from terminal: *EXPERIMENTAL* extension 'fastapi-framework' enabled fastapi-framework extension requires the 'prime' entry in the fastapi-framework/install-app part to start with app/ For more information, check out: https://documentation.ubuntu.com/rockcraft/en/latest/reference/extensions/fastapi-framework ```