I am trying to do a cloud build of the VRTK 4 sample Application. The setup advises you to create a new project and then clone VRTK in a directory under Assets. Git clone with required submodules into the Assets/ directory: git clone --recurse-submodules https://github.com/ExtendRealityLtd/VRTK.git change to the newly cloned directory: cd VRTK/ git submodule init && git submodule update Since this is a submodule it is not pushed to my repository from which I am building from. I tried a build anyway - still going after 1 hour. I think it is stalled but no obvious error messages from the build yet related to VRTK. Is this supported and if so what have I missed in the setup?