PeleLMeX depends on several separate GitHub repositories, each under active development. This can significantly complicate the required effort to keep all the required software up to date and internally compatible. The Pele codes rely on git "submodules" to get the appropriate version of each component, which dramatically simplifies the initial install/build/run procedure:
git clone --recursive https://github.com/AMReX-Combustion/PeleLMeX.git cd Exec/RegTests/FlameSheet/ make TPL && make -j 12 mpiexec -np 8 ./PeleLMeX2d.gnu.MPI.ex input.2d-regt
The PeleLMeX Documentation continues to be the best place to learn more about the code. You can also ask for help by opening up an issue on the PeleLMeX GitHub webpage.