By default MFIX-Exa CMake looks for an existing AMReX installation on the system. If none is found, it falls back to **SUPERBUILD** mode.
In this mode, MFIX-Exa CMake inherents AMReX CMake targets and configuration options, that is, MFIX-Exa and AMReX are configured and built as a single entity
In this mode, MFIX-Exa CMake inherits AMReX CMake targets and configuration options, that is, MFIX-Exa and AMReX are configured and built as a single entity
Assuming no valid AMReX installation is present on the target system, and ``AMReX_ROOT`` is not set (see :ref:`sec:build:standalone`), the following code will build MFIX-Exa in **SUPERBUILD** mode: