The current version of the ASL models are designed to build with the latest version of Fabber from FSL. Although it may be possible to build them against older FSL releases this is not guaranteed.
Build instructions for Fabber core and model libraries can be found here:
https://fabber-core.readthedocs.io/en/latest/building.html
You can verify that the ASL models are available whichever method you choose:
fabber_asl --listmodels
asl_multiphase
aslrest
buxton
linear
poly