diff --git a/init/Makefile b/init/Makefile
index 787d3149..cb75bdb0 100644
--- a/init/Makefile
+++ b/init/Makefile
@@ -1,18 +1,28 @@
-# install files and directories required by NetSender clients (such as gpio-netsender, revid-cli, etc.)
-# NB: the default (soft) install does not override conf files
+# Install files and directories required by NetSender clients (such as gpio-netsender, revid-cli, etc.)
+# and create a dhcpcd.enter-hook for setting the MAC address.
+# MA and DK can be optionally passed to Make, e.g, for a hard (first-time) installation:
+# 	sudo MA=mac DK=dk hard_install
+# NB: The default (soft) install does not override conf files.
 USER := $(shell whoami)
 PATH := /usr/local/go/bin:$(PATH)
+ifeq ($(MA),)
+	MA := "00:E0:4C:00:00:01"
+endif
+ifeq ($(DK),)
+	DK := 1
+endif
 
 .SILENT:make_dirs
 .SILENT:soft_copy_files
 .SILENT:hard_copy_files
+.SILENT:set_mac
 .SILENT:syncreboot
 .SILENT:clean
 
-install: as_root make_dirs soft_copy_files syncreboot
+install: as_root make_dirs soft_copy_files 
 	@echo "Install complete" 
 
-install_hard: as_root make_dirs hard_copy_files syncreboot
+install_hard: as_root make_dirs hard_copy_files set_mac syncreboot
 	@echo "Hard install complete" 
 
 as_root:
@@ -39,7 +49,7 @@ soft_copy_files:
 	if [ -f /etc/netsender.conf ] ; then \
 		echo "/etc/netsender.conf left unmodified" ; \
 	else \
-		cp netsender.conf /etc; \
+		printf "ma $(MA)\ndk $(DK)\n" > /etc/netsender.conf; \
 		chown pi /etc/netsender.conf; \
 	fi
 
@@ -53,9 +63,13 @@ hard_copy_files:
 		echo "Backed up netsender.conf to /etc/netsender.conf.bak"; \
 		cp /etc/netsender.conf /etc/netsender.conf.bak ; \
 	fi
-	cp -f netsender.conf /etc
+	printf "ma $(MA)\ndk $(DK)\n" > /etc/netsender.conf; \
 	chown pi /etc/netsender.conf
 
+set_mac:
+	printf "ip link set eth0 address $(MA)\n" > /etc/dhcpcd.enter-hook
+	chmod guo+x /etc/dhcpcd.enter-hook
+
 syncreboot:
 	cd ../../utils/cmd/syncreboot; make; make install