Add a Makefile for the keymap to disable command mode (to keep the keyboard from going into command mode when both Shift keys are hold at the same time) and to allow issuing a simple "make" in the keymap folder to compile it.

keyboards/ergodox_ez/keymaps/bepo/Makefile

@@ -0,0 +1,9 @@
+# Having a file like this allows you to override Makefile definitions
+# for your own particular keymap
+
+SLEEP_LED_ENABLE = no  # Breathing sleep LED during USB suspend
+COMMAND_ENABLE   = no  # Commands for debug and configuration
+
+ifndef QUANTUM_DIR
+	include ../../../../Makefile
+endif