Filter out master when getting the LATEST_ERLANG_OTP

core/kerl.mk

@@ -52,7 +52,9 @@ distclean-kerl:
 # Allow users to select which version of Erlang/OTP to use for a project.
 
 ifneq ($(strip $(LATEST_ERLANG_OTP)),)
-ERLANG_OTP := $(notdir $(lastword $(sort $(filter-out $(KERL_INSTALL_DIR)/OTP_R%,\
+# In some environments it is necessary to filter out master.
+ERLANG_OTP := $(notdir $(lastword $(sort\
+	$(filter-out $(KERL_INSTALL_DIR)/master $(KERL_INSTALL_DIR)/OTP_R%,\
 	$(filter-out %-rc1 %-rc2 %-rc3,$(wildcard $(KERL_INSTALL_DIR)/*[^-native]))))))
 endif