I was trying to clone your tree and make own build @ an Ubuntu 16.x VMWare Fusion vanilla machine but given compilation errors both for emu and master branches. No time to "debug" errors as I didn't have so much time. Hope to see Escalade compilation soon to test, if not I will try to build one myself at night!
Likely htop and nmon-system packages. I cannot seem to figure out why these packages won't compile on my Ubuntu VM but escalade can compile on arch. My only solution so far is to remove those from OEM depends.