diff --git a/Makefile b/Makefile
index 12e07e5..719f7e8 100644
--- a/Makefile
+++ b/Makefile
@@ -3,9 +3,9 @@ CFLAGS += -std=gnu11 -pedantic -Wall -Wextra \
 	-Werror -Wno-missing-braces -Wno-missing-field-initializers \
 	-Wno-unused-variable -Wno-unused-parameter -Wformat=2 -Wswitch-default \
 	-Wno-unused-label -Wno-unused-function -Wcast-align -Wpointer-arith -Wbad-function-cast \
-	-Wstrict-overflow=5 -Wstrict-prototypes -Winline -Wundef -Wnested-externs \
+	-Wstrict-prototypes -Winline -Wundef -Wnested-externs \
 	-Wcast-qual -Wshadow -Wunreachable-code -Wfloat-equal \
-	-Wstrict-aliasing=2 -Wredundant-decls -Wold-style-definition
+	-Wstrict-aliasing=3 -Wredundant-decls -Wold-style-definition
 LDFLAGS = -pthread
 SOURCES = con_queue.c log.c device_handler.c event_thread.c config.c connection.c \
 	data_channel.c snmp.c
@@ -15,11 +15,11 @@ OBJECTS = $(patsubst %.c, build/%.o, $(SOURCES))
 DEPS := $(OBJECTS:.o=.d)
 EXECUTABLES = build/brother-scand build/brother-scan-cli
 FIX_INCLUDE = fix_include
-ETCDIR := /etc/brother-scand
-BINDIR := /usr/bin
+ETCDIR := $(DESTDIR)/etc/brother-scand
+BINDIR := $(DESTDIR)/usr/bin
 PRINTUSER := brother-scand
-SYSTEMDPATH := /etc/systemd/system/$(PRINTUSER).service
-SYSLOGPATH := /etc/rsyslog.d/$(PRINTUSER).conf
+SYSTEMDPATH := $(DESTDIR)/etc/systemd/system/$(PRINTUSER).service
+SYSLOGPATH := $(DESTDIR)/etc/rsyslog.d/$(PRINTUSER).conf
 
 all: $(SOURCES) $(EXECUTABLES)
 
@@ -52,15 +52,12 @@ build/%.o: %.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 
 install: all
-	adduser --system --no-create-home $(PRINTUSER)
 	cp $(EXECUTABLES) $(BINDIR)/
 	mkdir -p $(ETCDIR)
 	[ -e $(ETCDIR)/scanner.conf ] || cp out/brother.config $(ETCDIR)/scanner.conf
 	for file in out/*.sh; do [ -e $(ETCDIR)/$$file ] || cp $$file $(ETCDIR)/; done
-	chown -R $(PRINTUSER) $(ETCDIR)
 	cp brother-scand.service $(SYSTEMDPATH)
 	cp syslog.conf $(SYSLOGPATH)
-	echo -e "Now edit $(ETCDIR)/scanner.conf. Then run:\n  systemctl restart rsyslog\n  systemctl enable $(PRINTUSER)"
 
 install_ufw:
 	cp brscand.ufw_profile /etc/ufw/applications.d/brscand