Hi, to be able to compile grass with libLAS you must have libproj.so.9 ln -s libproj.so.12.0.0 libproj.so.9 ENABLE="sqlite, gmath, unixODBC, libLAS" ./grass.SlackBuild and for qgis ln -s libgeos-3.6.1.so libgeos-3.6.0.so slpkg -s sbo qgis This compile but not sure it works fine I will test asap