I want to simulate contiuous materials, so I downloaded the package from https://github.com/richti83/LIGGGHTS-WITH-BONDS and copied it into the source file. When I compiled the package (type "make yes-bondspackage" in src), it said "bondspackage do not exist". Could anybody help me with that please? Could anybody tell me what correct steps are from downloding the package to running it successfully in 3.8? I really appreciate it.