It is recommended, and by far the easiest way, to install FLaapLUC using e.g. conda:
conda install -c jlenain -c conda-forge -c fermi flaapluc
If you want to create a new environment for FLaapLUC, the following will do so, handling almost all required dependencies:
conda create -n flaapluc -c jlenain -c conda-forge -c fermi flaapluc
FLaapLUC depends on the Fermi-LAT ScienceTools as well as Enrico. The Fermi-LAT ScienceTools should automatically come with a conda installation of FLaapLUC. Enrico should be manually installed, though.
It is of course still possible to build FLaapLUC from the source code to enjoy the bleeding-edge developments (and bugs!):
git clone https://github.com/jlenain/flaapluc
cd flaapluc
python setup.py install
To activate your configuration for FLaapLUC, just do the following:
conda activate flaapluc