diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..09b121a1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+*~
+.#*
+/output/
diff --git a/Makefile b/Makefile
index 79781c09..b468ecd7 100644
--- a/Makefile
+++ b/Makefile
@@ -8,6 +8,8 @@ DEVICE_PORT_BOOTLOADER := `ls /dev/ttyACM*`
 ARDUINO_PATH=/usr/local/arduino
 ARDUINO_LOCAL_LIB_PATH=$(HOME)/Arduino
 
+MD5 = md5sum
+
 RESET_BOARD=stty -F $(DEVICE_PORT) 1200
 
 ifeq ($(uname_S),Darwin)
@@ -21,6 +23,9 @@ DEVICE_PORT_BOOTLOADER := `ls /dev/cu.usbmodem14*`
 
 ARDUINO_PATH=/Applications/Arduino.app/Contents/Java/
 ARDUINO_LOCAL_LIB_PATH=$(HOME)/Documents/Arduino
+
+MD5 = md5
+
 RESET_BOARD=stty -f $(DEVICE_PORT) 1200
 
 endif
@@ -110,7 +115,7 @@ size: compile
 hex-with-bootloader: compile
 	@cat $(HEX_FILE_PATH) | awk '/^:00000001FF/ == 0' > $(HEX_FILE_WITH_BOOTLOADER_PATH)
 	@echo "Using $(BOOTLOADER_PATH)"
-	@md5 $(BOOTLOADER_PATH)
+	@$(MD5) $(BOOTLOADER_PATH)
 	@cat $(BOOTLOADER_PATH) >> $(HEX_FILE_WITH_BOOTLOADER_PATH)
 	@echo "Combined firmware and bootloader are now at $(HEX_FILE_WITH_BOOTLOADER_PATH)"
 	@echo "Make sure you have the bootloader version you expect."
diff --git a/library.properties b/library.properties
index 2f1c8d32..8efecb1d 100644
--- a/library.properties
+++ b/library.properties
@@ -7,4 +7,3 @@ paragraph=...
 category=Communication
 url=https://github.com/keyboardio/KeyboardioFirmware
 architectures=avr
-dot_a_linkage=true