C:\dev\ImWindow\build>build
C:/dev/ImWindow/build/genie.lua:89: attempt to concatenate a nil value (global '_ACTION')
stack traceback:
C:/dev/ath/ImWindow/build/genie.lua:89: in main chunk
[C]: in upvalue 'builtin_dofile'
[string "premake = { }..."]:85: in function 'dofile'
[string "_WORKING_DIR = os.getcwd()..."]:41: in function '_premake_main'
vs2015 upd1 installed, otherwise clean system