The Board Support Packages (BSPs) usually provide source code as well as precompiled images for one or more platforms. Please see the version matrix for details on each revision of the BSP.
PTXdist version XXXX.YY.0 is required to compile an OSELAS Toolchain XXXX.YY.Z. The version of PTXdist and toolchain required to build a given BSP revision is shown in the version matrix.
PTXdist manual "How to become a PTXdist Guru" ☚ worthwhile reading