diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..73deb59
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+*.ibc
+*.o
+/build-*
diff --git a/Blink.idr b/Blink.idr
index 0f04223..20b890f 100644
--- a/Blink.idr
+++ b/Blink.idr
@@ -1,16 +1,18 @@
 module Main
 
+%include C "idris_arduino.h"
+
 digitalWrite : Int -> Int -> IO ()
-digitalWrite pin val = mkForeign (FFun "idrard_digitalWrite" [FInt, FInt] FUnit) pin val
+digitalWrite pin val = foreign FFI_C "idrard_digitalWrite" (Int -> Int -> IO ()) pin val
 
 pinMode : Int -> Int -> IO ()
-pinMode pin mode = mkForeign (FFun "idrard_pinMode" [FInt, FInt] FUnit) pin mode
+pinMode pin mode = foreign FFI_C "idrard_pinMode" (Int -> Int -> IO ()) pin mode
 
 delay : Int -> IO ()
-delay ms = mkForeign (FFun "idrard_delay" [FInt] FUnit) ms
+delay ms = foreign FFI_C "idrard_delay" (Int -> IO ()) ms
 
 blink : Int -> Int -> IO ()
-blink pin ms = mkForeign (FFun "idrard_blink" [FInt, FInt] FUnit) pin  ms
+blink pin ms = foreign FFI_C "idrard_blink" (Int -> Int -> IO ()) pin ms
 
 main : IO ()
 main =
diff --git a/Idris.mk b/Idris.mk
index 7d47f1e..30f0acc 100644
--- a/Idris.mk
+++ b/Idris.mk
@@ -1,9 +1,18 @@
-IDRIS_CFLAGS += -I$(IDRIS_RTS_PATH) -I$(IDRIS_RTS_PATH)/arduino
-EXTRA_FLAGS = $(IDRIS_CFLAGS) -DFORCE_ALIGNMENT -DIDRIS_TARGET_OS=\"none\" -DIDRIS_TARGET_TRIPLE=\"arduino\"
+IDRIS_INCLUDES += -I$(IDRIS_RTS_PATH) -I$(IDRIS_RTS_PATH)/arduino
+CFLAGS   += $(IDRIS_INCLUDES)
+
+IDRIS_RTS_CFLAGS = -DFORCE_ALIGNMENT -DIDRIS_TARGET_OS=\"none\" -DIDRIS_TARGET_TRIPLE=\"arduino\"
 
 NO_CORE_MAIN_CPP := "true"
 
-RTS_OBJS = $(OBJDIR)/rts/arduino/idris_main.o $(OBJDIR)/rts/idris_gc.o $(OBJDIR)/rts/idris_rts.o $(OBJDIR)/rts/idris_bitstring.o $(OBJDIR)/rts/idris_gmp.o $(OBJDIR)/rts/idris_heap.o $(OBJDIR)/rts/mini-gmp.o
+RTS_OBJS = \
+	$(OBJDIR)/rts/arduino/idris_main.o \
+	$(OBJDIR)/rts/idris_gc.o \
+	$(OBJDIR)/rts/idris_rts.o \
+	$(OBJDIR)/rts/idris_bitstring.o \
+	$(OBJDIR)/rts/idris_gmp.o \
+	$(OBJDIR)/rts/idris_heap.o \
+	$(OBJDIR)/rts/mini-gmp.o
 
 OTHER_OBJS += $(RTS_OBJS) $(IDRIS_MAIN:.idr=.o)
 
@@ -15,4 +24,4 @@ include $(ARDUINO_MAKEFILE_PATH)
 # Idris rts files
 $(OBJDIR)/rts/%.o: $(IDRIS_RTS_PATH)/%.c $(COMMON_DEPS) | $(OBJDIR)
 	@$(MKDIR) $(dir $@)
-	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $(IDRIS_C_FLAGS) $< -o $@
+	$(CC) -MMD -c $(CPPFLAGS) $(CFLAGS) $(IDRIS_RTS_CFLAGS) $< -o $@
diff --git a/Makefile.example b/Makefile.example
new file mode 100644
index 0000000..f8a35da
--- /dev/null
+++ b/Makefile.example
@@ -0,0 +1,12 @@
+ADRUINO_DIR=/usr/share/arduino
+AVR_TOOLS_DIR=/usr
+AVRDUDE_CONF=/etc/avrdude.conf
+IDRIS_RTS_PATH=rts
+ARDUINO_MAKEFILE_PATH=/usr/share/arduino/Arduino.mk
+
+IDRIS_MAIN=Blink.idr
+
+BOARD_TAG=mega
+BOARD_SUB=atmega2560
+
+include Idris.mk
diff --git a/README.md b/README.md
index 82ac962..84b11e7 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,9 @@ Next you will need to update the `Makefile` in this directory.
 You will need to set the following variables:
 
  * `ARDUINO_DIR`    = *where you unpacked the Arduino software*
- * `BOARD_TAG`      = *your board*
+ * `AVR_TOOLS_DIR`  = *dir containing `bin/avr-gcc` unless it is shipped with the Arduino software*
+ * `AVRDUDE_CONF`   = *path to `avrdude.conf` unless avrdude is shipped with the Arduino software*
+ * `BOARD_TAG` and `BOARD_SUB` = *your board name (e.g., uno, mega) and subname (if applicable, e.g. atmega2560 for mega)*
  * `IDRIS_RTS_PATH` = *path to the source for the RTS. Could point to the git source or to the copy of the files installed by cabal*
  * `ARDUINO_MAKEFILE_PATH` = *path to the `Arduino.mk` from step 2*