diff --git a/Arduino.mk b/Arduino.mk
index 76a7d5e..beda93e 100644
--- a/Arduino.mk
+++ b/Arduino.mk
@@ -262,29 +262,6 @@ else
     $(call show_config_variable,ARDMK_DIR,[USER])
 endif
 
-########################################################################
-# Arduino Directory
-
-ifndef ARDUINO_DIR
-    AUTO_ARDUINO_DIR := $(firstword \
-        $(call dir_if_exists,/usr/share/arduino) \
-        $(call dir_if_exists,/Applications/Arduino.app/Contents/Resources/Java) )
-    ifdef AUTO_ARDUINO_DIR
-       ARDUINO_DIR = $(AUTO_ARDUINO_DIR)
-       $(call show_config_variable,ARDUINO_DIR,[AUTODETECTED])
-    else
-        echo $(error "ARDUINO_DIR is not defined")
-    endif
-else
-    $(call show_config_variable,ARDUINO_DIR,[USER])
-endif
-
-ifeq ($(CURRENT_OS),WINDOWS)
-    ifneq ($(shell echo $(ARDUINO_DIR) | egrep '^(/|[a-zA-Z]:\\)'),)
-        echo $(error On Windows, ARDUINO_DIR must be a relative path)
-    endif
-endif
-
 ########################################################################
 # Default TARGET to pwd (ex Daniele Vergini)
 
diff --git a/Common.mk b/Common.mk
index 0c1bc0b..b77c644 100644
--- a/Common.mk
+++ b/Common.mk
@@ -45,6 +45,29 @@ else
 endif
 $(call show_config_variable,CURRENT_OS,[AUTODETECTED])
 
+########################################################################
+# Arduino Directory
+
+ifndef ARDUINO_DIR
+    AUTO_ARDUINO_DIR := $(firstword \
+        $(call dir_if_exists,/usr/share/arduino) \
+        $(call dir_if_exists,/Applications/Arduino.app/Contents/Resources/Java) )
+    ifdef AUTO_ARDUINO_DIR
+       ARDUINO_DIR = $(AUTO_ARDUINO_DIR)
+       $(call show_config_variable,ARDUINO_DIR,[AUTODETECTED])
+    else
+        echo $(error "ARDUINO_DIR is not defined")
+    endif
+else
+    $(call show_config_variable,ARDUINO_DIR,[USER])
+endif
+
+ifeq ($(CURRENT_OS),WINDOWS)
+    ifneq ($(shell echo $(ARDUINO_DIR) | egrep '^(/|[a-zA-Z]:\\)'),)
+        echo $(error On Windows, ARDUINO_DIR must be a relative path)
+    endif
+endif
+
 ########################################################################
 #
 # Travis-CI
diff --git a/Teensy.mk b/Teensy.mk
index 3b9676d..42282aa 100644
--- a/Teensy.mk
+++ b/Teensy.mk
@@ -4,7 +4,9 @@
 #
 # https://www.pjrc.com/teensy/
 #
-# Example sketch: https://github.com/stepcut/teensy-blink
+# You must install teensyduino for this Makefile to work:
+#
+# http://www.pjrc.com/teensy/teensyduino.html
 #
 # Copyright (C) 2014 Jeremy Shaw <jeremy@n-heptane.com> based on
 # work that is copyright Sudar, Nicholas Zambetti, David A. Mellis
@@ -19,12 +21,18 @@
 #
 # Original Arduino adaptation by mellis, eighthave, oli.keller
 #
-# Current version: 1.3.4
-#
 # Refer to HISTORY.md file for complete history of changes
 #
 ########################################################################
 
+
+ifndef ARDMK_DIR
+    ARDMK_DIR := $(realpath $(dir $(realpath $(lastword $(MAKEFILE_LIST)))))
+endif
+
+# include Common.mk now we know where it is
+include $(ARDMK_DIR)/Common.mk
+
 VENDOR              = teensy
 ARDUINO_CORE_PATH   = $(ARDUINO_DIR)/hardware/teensy/cores/teensy3
 BOARDS_TXT          = $(ARDUINO_DIR)/hardware/$(VENDOR)/boards.txt
@@ -121,11 +129,22 @@ ifndef MCU
     MCU := $(call PARSE_TEENSY,$(BOARD_TAG),build.cpu)
     ifndef MCU
         MCU := $(call PARSE_TEENSY,$(BOARD_TAG),build.mcu)
-    else
-        MCU_FLAG_NAME=mcpu
     endif
 endif
 
+ifndef MCU_FLAG_NAME
+    MCU_FLAG_NAME=mcpu
+endif
+
+#ifndef MCU
+#    MCU := $(call PARSE_TEENSY,$(BOARD_TAG),build.cpu)
+#    ifndef MCU
+#        MCU := $(call PARSE_TEENSY,$(BOARD_TAG),build.mcu)
+#    else
+#        MCU_FLAG_NAME=mcpu
+#    endif
+#endif
+
 ########################################################################
 # FLAGS
 
@@ -159,8 +178,4 @@ RESET_CMD = nohup $(ARDUINO_DIR)/hardware/tools/teensy_post_compile -board=$(BOA
 ########################################################################
 # automatially include Arduino.mk for the user
 
-ifndef ARDMK_DIR
-    ARDMK_DIR := $(realpath $(dir $(realpath $(lastword $(MAKEFILE_LIST)))))
-endif
-
 include $(ARDMK_DIR)/Arduino.mk
diff --git a/examples/BlinkTeensy/Makefile b/examples/BlinkTeensy/Makefile
index 84ae31f..1d59ef2 100644
--- a/examples/BlinkTeensy/Makefile
+++ b/examples/BlinkTeensy/Makefile
@@ -1,4 +1,3 @@
-ARDUINO_DIR  = /home/stepcut/n-heptane/projects/arduino/arduino-1.0.6
 BOARD_TAG    = teensy31
 ARDUINO_LIBS =