The Tool Desk
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How flatpak-builder and flatpak build relate
These are not competing tools at the same level. The official Flatpak Builder command reference describes flatpak-builder as a wrapper around flatpak build that automates building applications and their dependencies.
flatpak-builder takes a manifest and a build directory. The manifest describes the application and its modules, including source locations and build instructions. The builder can fetch and verify sources, build and install modules, finish the application, and export the result to a repository. The build directory can also be used for testing and debugging. The wrapper initializes the app directory, uses flatpak build to build and install modules, cleans the final build tree, and finishes the app.
When to use flatpak-builder
For a manifest-driven application build
Choose flatpak-builder when you are packaging an application from sources described in a JSON or YAML manifest. The manifest records details such as the application ID, runtime, runtime version, SDK, command, and modules. The Flatpak first-build tutorial walks through this kind of workflow.
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When you want a build-to-install or build-to-export workflow
The builder can take a completed build through to local installation or repository export. The tutorial demonstrates using --repo and --install; the Flatpak Builder documentation also describes exporting to a repository or installing locally.
When to use flatpak build directly
Use the lower-level command when your workflow deliberately needs to control the build operation itself rather than ask the manifest-driven wrapper to coordinate the full application build. The command reference establishes its role beneath flatpak-builder, but does not cover every standalone use case or provide a complete direct-command sequence for each task.
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Because command options can vary by installed version, check flatpak build --help locally before relying on particular flags. The command-reference result reviewed here reports version 1.4.12; that is not a guarantee that your system has the same version.
Choose the output based on how you will distribute the app
If people need to receive updates, a repository is the preferred distribution route. Single-file bundles can suit some direct-download or removable-media situations, but they do not include dependencies or AppStream data. See the Flatpak Builder documentation for the distinction between repository and bundle outputs.
Quick Recap
A practical decision
- Building an application from a manifest: use
flatpak-builder. - Wanting the builder to handle module builds and then install or export: use
flatpak-builder. - Need direct control of an individual lower-level build step: use
flatpak build, checking your installed version’s help for the applicable options. - Choosing a distribution format: prefer a repository when updates matter; consider a bundle only when its dependency and AppStream limitations fit the use case.
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