# sfdk build-shell

> Executes custom steps in build engine.
> See also: `sfdk config` for configuring the build target and `sfdk build-init` for initializing build tree.
> More information: <https://docs.sailfishos.org/Develop/Apps/Tutorials/Building_packages_-_advanced_techniques/>.

- Launch interactive shell in the build engine:

`sfdk build-shell`

- Run a specified command in the build shell:

`sfdk build-shell {{command}}`

- Launch interactive shell in the build engine in maintenance mode, when inspecting or modifying the build environment:

`sfdk build-shell --maintain`