diff --git a/Makefile b/Makefile
index 463a11f..f20072c 100644
--- a/Makefile
+++ b/Makefile
@@ -5,11 +5,11 @@ CFLAGS      += -Wall
 LIBS        = `pkg-config --libs --cflags libusb-1.0`
 RM          = /bin/rm -f
 OBJS        = usb_modeswitch.c
-PREFIX      = $(DESTDIR)/usr
-ETCDIR      = $(DESTDIR)/etc
+PREFIX      = /usr/local
+ETCDIR      = $(PREFIX)/etc
 SYSDIR      = $(ETCDIR)/systemd/system
 UPSDIR      = $(ETCDIR)/init
-UDEVDIR     = $(DESTDIR)/lib/udev
+UDEVDIR     = $(PREFIX)/lib/udev
 SBINDIR     = $(PREFIX)/sbin
 MANDIR      = $(PREFIX)/share/man/man1
 VPATH       = jimtcl
@@ -22,10 +22,17 @@ endif
 JIM_CONFIGURE_OPTS = --disable-lineedit \
 	--with-out-jim-ext="stdlib posix load signal syslog" --prefix=/usr
 
+USE_UPSTART=$(shell if command -v initctl > /dev/null; then echo "true"; fi)
+USE_SYSTEMD=$(shell if command -v systemctl > /dev/null; then echo "true"; fi)
+
 .PHONY: clean install install-common uninstall \
 	script shared static \
 	dispatcher-script dispatcher-shared dispatcher-static \
-	install-script install-shared install-static
+	install-script install-shared install-static \
+	install-upstart install-systemd \
+	configure-dispatcher configure-script \
+	configure-upstart configure-systemd \
+	configure
 
 all: script
 
@@ -46,7 +53,25 @@ jim/libjim.a:
 	cd jim && CFLAGS="$(CFLAGS)" CC="$(CC)" ./configure $(JIM_CONFIGURE_OPTS)
 	$(MAKE) -C jim lib
 
-dispatcher-script: usb_modeswitch.tcl
+configure-dispatcher:
+	sed -i \
+	  -e 's,^\(set setup(sbindir) \).*$$,\1$(SBINDIR),' \
+	  -e 's,^\(set setup(etcdir) \).*$$,\1$(ETCDIR),' \
+	  usb_modeswitch.tcl
+
+configure-script:
+	sed -i -e 's,^\(SBINDIR=\).*$$,\1$(SBINDIR),' usb_modeswitch.sh
+
+configure-systemd:
+	sed -i -e 's,@sbindir@,$(SBINDIR),' usb_modeswitch@.service
+
+configure-upstart:
+	sed -i -e 's,@sbindir@,$(SBINDIR),' usb-modeswitch-upstart.conf
+
+configure: configure-dispatcher configure-script \
+	configure-systemd configure-upstart
+
+dispatcher-script: configure-dispatcher usb_modeswitch.tcl
 	sed 's_!/usr/bin/tclsh_!'"$(TCL)"'_' < usb_modeswitch.tcl > usb_modeswitch_dispatcher
 
 dispatcher-shared: jim/libjim.so dispatcher.c usb_modeswitch.string
@@ -55,7 +80,7 @@ dispatcher-shared: jim/libjim.so dispatcher.c usb_modeswitch.string
 dispatcher-static: jim/libjim.a dispatcher.c usb_modeswitch.string
 	$(CC) dispatcher.c $(LDFLAGS) jim/libjim.a -Ijim -o usb_modeswitch_dispatcher $(CFLAGS)
 
-usb_modeswitch.string: usb_modeswitch.tcl
+usb_modeswitch.string: configure-dispatcher usb_modeswitch.tcl
 	$(HOST_TCL) make_string.tcl usb_modeswitch.tcl > $@
 
 clean:
@@ -76,16 +101,28 @@ ums-clean:
 # If the systemd folder is present, install the service for starting the dispatcher
 # If not, use the dispatcher directly from the udev rule as in previous versions
 
-install-common: $(PROG) usb_modeswitch_dispatcher
-	install -D --mode=755 usb_modeswitch $(SBINDIR)/usb_modeswitch
-	install -D --mode=755 usb_modeswitch.sh $(UDEVDIR)/usb_modeswitch
-	install -D --mode=644 usb_modeswitch.conf $(ETCDIR)/usb_modeswitch.conf
-	install -D --mode=644 usb_modeswitch.1 $(MANDIR)/usb_modeswitch.1
-	install -D --mode=644 usb_modeswitch_dispatcher.1 $(MANDIR)/usb_modeswitch_dispatcher.1
-	install -D --mode=755 usb_modeswitch_dispatcher $(SBINDIR)/usb_modeswitch_dispatcher
+install-common: $(PROG) configure usb_modeswitch_dispatcher
+	install -D --mode=755 usb_modeswitch $(DESTDIR)$(SBINDIR)/usb_modeswitch
+	install -D --mode=755 usb_modeswitch.sh $(DESTDIR)$(UDEVDIR)/usb_modeswitch
+	install -D --mode=644 usb_modeswitch.conf $(DESTDIR)$(ETCDIR)/usb_modeswitch.conf
+	install -D --mode=644 usb_modeswitch.1 $(DESTDIR)$(MANDIR)/usb_modeswitch.1
+	install -D --mode=644 usb_modeswitch_dispatcher.1 $(DESTDIR)$(MANDIR)/usb_modeswitch_dispatcher.1
+	install -D --mode=755 usb_modeswitch_dispatcher $(DESTDIR)$(SBINDIR)/usb_modeswitch_dispatcher
 	install -d $(DESTDIR)/var/lib/usb_modeswitch
-	test -d $(UPSDIR) -a -e /sbin/initctl && install --mode=644 usb-modeswitch-upstart.conf $(UPSDIR) || test 1
-	test -d $(SYSDIR) -a \( -e /usr/bin/systemctl -o -e /bin/systemctl \) && install --mode=644 usb_modeswitch@.service $(SYSDIR) || test 1
+
+install-upstart:
+	install -D --mode=644 usb-modeswitch-upstart.conf $(DESTDIR)$(UPSDIR)/usb-modeswitch-upstart.conf
+
+install-systemd:
+	install -D --mode=644 usb_modeswitch@.service $(DESTDIR)$(SYSDIR)/usb_modeswitch@.service
+
+ifeq ($(USE_UPSTART),true)
+install-common: install-upstart
+endif
+
+ifeq ($(USE_SYSTEMD),true)
+install-common: install-systemd
+endif
 
 install: install-script
 
@@ -96,10 +133,10 @@ install-shared: dispatcher-shared install-common
 install-static: dispatcher-static install-common
 
 uninstall:
-	$(RM) $(SBINDIR)/usb_modeswitch
-	$(RM) $(SBINDIR)/usb_modeswitch_dispatcher
-	$(RM) $(UDEVDIR)/usb_modeswitch
-	$(RM) $(ETCDIR)/usb_modeswitch.conf
-	$(RM) $(MANDIR)/usb_modeswitch.1
+	$(RM) $(DESTDIR)$(SBINDIR)/usb_modeswitch
+	$(RM) $(DESTDIR)$(SBINDIR)/usb_modeswitch_dispatcher
+	$(RM) $(DESTDIR)$(UDEVDIR)/usb_modeswitch
+	$(RM) $(DESTDIR)$(ETCDIR)/usb_modeswitch.conf
+	$(RM) $(DESTDIR)$(MANDIR)/usb_modeswitch.1
 	$(RM) -R $(DESTDIR)/var/lib/usb_modeswitch
-	$(RM) $(SYSDIR)/usb_modeswitch@.service
+	$(RM) $(DESTDIR)$(SYSDIR)/usb_modeswitch@.service
diff --git a/usb-modeswitch-upstart.conf b/usb-modeswitch-upstart.conf
index 0d82b69..1c177b4 100644
--- a/usb-modeswitch-upstart.conf
+++ b/usb-modeswitch-upstart.conf
@@ -1,5 +1,5 @@
 start on usb-modeswitch-upstart
 task
 script
-	exec /usr/sbin/usb_modeswitch_dispatcher --switch-mode $UMS_PARAM
+	exec @sbindir@/usb_modeswitch_dispatcher --switch-mode $UMS_PARAM
 end script
diff --git a/usb_modeswitch.sh b/usb_modeswitch.sh
index eb3fa3e..0e93166 100755
--- a/usb_modeswitch.sh
+++ b/usb_modeswitch.sh
@@ -1,5 +1,9 @@
 #!/bin/sh
 # part of usb_modeswitch 2.5.2
+
+# Compile time configuration, injected by the Makefile
+SBINDIR=/usr/sbin
+
 device_in()
 {
 	if [ ! -e /var/lib/usb_modeswitch/$1 ]; then
@@ -37,7 +41,7 @@ if [ $(expr "$1" : "--.*") ]; then
 		v_id=$3
 	fi
 fi
-PATH=/sbin:/usr/sbin:$PATH
+
 case "$1" in
 	--driver-bind)
 		# driver binding code removed
@@ -46,9 +50,7 @@ case "$1" in
 	--symlink-name)
 		device_in "link_list" $v_id $p_id
 		if [ "$?" = "1" ]; then
-			if [ -e "/usr/sbin/usb_modeswitch_dispatcher" ]; then
-				exec usb_modeswitch_dispatcher $1 $2 2>>/dev/null
-			fi
+			exec $SBINDIR/usb_modeswitch_dispatcher $1 $2 2>>/dev/null
 		fi
 		exit 0
 		;;
@@ -61,15 +63,13 @@ if [ "$p2" = "" -a "$p1" != "" ]; then
 	p2=$p1
 fi
 
-PATH=/bin:/sbin:/usr/bin:/usr/sbin
-init_path=`readlink -f /sbin/init`
-if [ `basename $init_path` = "systemd" ]; then
+if command -v systemctl > /dev/null; then
 	systemctl --no-block start usb_modeswitch@$p2.service
-elif [ -e "/etc/init/usb-modeswitch-upstart.conf" ]; then
+elif command -v initctl > /dev/null; then
 	initctl emit --no-wait usb-modeswitch-upstart UMS_PARAM=$p2
 else
 	# only old distros, new udev will kill all subprocesses
 	exec 1<&- 2<&- 5<&- 7<&-
-	exec usb_modeswitch_dispatcher --switch-mode $p2 &
+	exec $SBINDIR/usb_modeswitch_dispatcher --switch-mode $p2 &
 fi
 exit 0
diff --git a/usb_modeswitch.tcl b/usb_modeswitch.tcl
index d2ee50c..8a48751 100755
--- a/usb_modeswitch.tcl
+++ b/usb_modeswitch.tcl
@@ -12,6 +12,16 @@
 # Part of usb-modeswitch-2.5.2 package
 # (C) Josua Dietze 2009-2017
 
+# Compile-time configuration, injected by the Makefile.
+set setup(sbindir) /usr/sbin
+set setup(etcdir) /etc
+
+# External dependency default location
+set setup(dbdir) /usr/share/usb_modeswitch
+
+# Derived configuration
+set setup(dbdir_etc) $setup(etcdir)/usb_modeswitch.d
+
 set arg0 [lindex $argv 0]
 if [regexp {\.tcl$} $arg0] {
 	if [file exists $arg0] {
@@ -91,10 +101,8 @@ if {![regexp {(.*?):.*$} $arg1 d device]} {
 }
 set flags(logwrite) 1
 
-set setup(dbdir) /usr/share/usb_modeswitch
-set setup(dbdir_etc) /etc/usb_modeswitch.d
 if {![file exists $setup(dbdir)] && ![file exists $setup(dbdir_etc)]} {
-	Log "\nError: no config database found in /usr/share or /etc. Exit"
+	Log "\nError: no config database found in $setup(dbdir) or $setup(dbdir_etc). Exit"
 	SafeExit
 }
 
@@ -261,7 +269,7 @@ if {$config(NoMBIMCheck)==0 && $usb(bNumConfigurations) > 1} {
 	if [CheckMBIM] {
 		Log " driver for MBIM devices is available"
 		Log "Find MBIM configuration number ..."
-		if [catch {set cfgno [exec /usr/sbin/usb_modeswitch -j -Q $busParam $devParam -v $usb(idVendor) -p $usb(idProduct)]} err] {
+		if [catch {set cfgno [exec $setup(sbindir)/usb_modeswitch -j -Q $busParam $devParam -v $usb(idVendor) -p $usb(idProduct)]} err] {
 			Log "Error when trying to find MBIM configuration, switch to legacy modem mode"
 		} else {
 			set cfgno [string trim $cfgno]
@@ -297,7 +305,7 @@ if {$report == ""} {
 	# Now we are actually switching
 	if $flags(logging) {
 		Log "Command line:\nusb_modeswitch -W -D $configParam $busParam $devParam -v $usb(idVendor) -p $usb(idProduct) -f \$flags(config)"
-		catch {set report [exec /usr/sbin/usb_modeswitch -W -D $configParam $busParam $devParam -v $usb(idVendor) -p $usb(idProduct) -f "$flags(config)" 2>@1]} report
+		catch {set report [exec $setup(sbindir)/usb_modeswitch -W -D $configParam $busParam $devParam -v $usb(idVendor) -p $usb(idProduct) -f "$flags(config)" 2>@1]} report
 		Log "\nVerbose debug output of usb_modeswitch and libusb follows"
 		Log "(Note that some USB errors are to be expected in the process)"
 		Log "--------------------------------"
@@ -305,7 +313,7 @@ if {$report == ""} {
 		Log "--------------------------------"
 		Log "(end of usb_modeswitch output)\n"
 	} else {
-		catch {set report [exec /usr/sbin/usb_modeswitch -Q -D $configParam $busParam $devParam -v $usb(idVendor) -p $usb(idProduct) -f "$flags(config)" 2>@1]} report
+		catch {set report [exec $setup(sbindir)/usb_modeswitch -Q -D $configParam $busParam $devParam -v $usb(idVendor) -p $usb(idProduct) -f "$flags(config)" 2>@1]} report
 	}
 }
 
@@ -498,9 +506,9 @@ return 1
 
 proc {ParseGlobalConfig} {} {
 
-global flags
+global flags setup
 set configFile ""
-set places [list /etc/usb_modeswitch.conf /etc/sysconfig/usb_modeswitch /etc/default/usb_modeswitch]
+set places [list $setup(etcdir)/usb_modeswitch.conf $setup(etcdir)/sysconfig/usb_modeswitch $setup(etcdir)/default/usb_modeswitch]
 foreach cfg $places {
 	if [file exists $cfg] {
 		set configFile $cfg
@@ -897,10 +905,12 @@ proc {SysLog} {msg} {
 
 global flags
 if {![info exists flags(logger)]} {
-	set flags(logger) ""
-	foreach fn {/bin/logger /usr/bin/logger} {
-		if [file exists $fn] {
-			set flags(logger) $fn
+	set flags(logger) [exec sh -c "command -v logger || true"]
+	if {$flags(logger) == ""} {
+		foreach fn {/bin/logger /usr/bin/logger} {
+			if [file exists $fn] {
+				set flags(logger) $fn
+			}
 		}
 	}
 	Log "Logger is $flags(logger)"
diff --git a/usb_modeswitch@.service b/usb_modeswitch@.service
index f74a8bf..90cb96a 100644
--- a/usb_modeswitch@.service
+++ b/usb_modeswitch@.service
@@ -3,6 +3,6 @@ Description=USB_ModeSwitch_%i
 
 [Service]
 Type=oneshot
-ExecStart=/usr/sbin/usb_modeswitch_dispatcher --switch-mode %i
+ExecStart=@sbindir@/usb_modeswitch_dispatcher --switch-mode %i
 #ExecStart=/bin/echo %i