--- ../configure.orig	2019-10-03 20:46:03.724288763 +0200
+++ ./configure	2019-10-03 20:45:33.167665636 +0200
@@ -5,7 +5,7 @@
 # 
 
 # You may comment out/uncomment any of these lines to change defaults.
-PREFIX=/usr/local
+PREFIX=@TERMUX_PREFIX@/local
 ENABLE_2P=y		# 2-player
 ENABLE_JS=y		# joystick
 ENABLE_NETWORK=y
@@ -209,7 +209,7 @@
 fi
 
 
-DPREFIX=/usr
+DPREFIX=@TERMUX_PREFIX@
 if [ -n "$DJDIR" ]; then
 	echo "DJDIR is set to $DJDIR"
 	DPREFIX=$DJDIR
@@ -305,7 +305,7 @@
 done
 
 in_inc_search() {
-	if [ $DPREFIX = /usr ] && [ $path = /usr/include ]; then
+	if [ $DPREFIX = @TERMUX_PREFIX@ ] && [ $path = @TERMUX_PREFIX@/include ]; then
 		return 0
 	fi
 	for path in $INC_SEARCH 1; do
@@ -315,7 +315,7 @@
 }
 
 add_path_ldflags() {
-	if [ $DPREFIX = /usr ] && [ ${1#/usr} = /lib ]; then
+	if [ $DPREFIX = @TERMUX_PREFIX@ ] && [ ${1#@TERMUX_PREFIX@} = /lib ]; then
 		return 1
 	fi
 	libpath=-L$1
@@ -337,7 +337,7 @@
 	else
 		echo $n "checking for linux/joystick.h... $c"
 		linux_inc=
-		for path in $INC_SEARCH /usr/include; do
+		for path in $INC_SEARCH @TERMUX_PREFIX@/include; do
 			if [ -d $path/linux ]; then
 				linux_inc=$path/linux
 				break
@@ -382,7 +382,7 @@
 	echo $n "checking for curses... $c"
 	WITH_CURSES=
 	if [ $OS = unix ]; then
-		search="/lib /usr/lib /usr/local/lib"
+		search="/lib @TERMUX_PREFIX@/lib @TERMUX_PREFIX@/local/lib"
 	else
 		search=$DPREFIX/lib
 	fi
@@ -406,7 +406,7 @@
 if [ -n "$WITH_CURSES" ]; then
 	echo $n "checking for curses.h... $c"
 	CURSES_INC=
-	for path in $INC_SEARCH $DPREFIX/include /usr/local/include; do
+	for path in $INC_SEARCH $DPREFIX/include @TERMUX_PREFIX@/local/include; do
 		if [ -f $path/ncurses/curses.h ]; then
 			path=$path/ncurses
 		fi
@@ -432,7 +432,7 @@
 if [ -n "$WITH_X" ]; then
 	echo $n "checking for Xlib... $c"
 	WITH_X=
-	xpath='/usr /usr/X11R6 /usr/X11 /usr/local /usr/X11R7'
+	xpath='@TERMUX_PREFIX@ @TERMUX_PREFIX@/X11R6 @TERMUX_PREFIX@/X11 @TERMUX_PREFIX@/local @TERMUX_PREFIX@/X11R7'
 	search=$LIB_SEARCH
 	for path in $xpath; do
 		search="$search $path/lib"
@@ -442,7 +442,7 @@
 		if check_dynlib $path X11; then
 			echo found in $path
 			WITH_X=-lX11
-			if [ $path != /usr ]; then
+			if [ $path != @TERMUX_PREFIX@ ]; then
 				libpath=$path
 			fi
 			break
@@ -570,7 +570,7 @@
 TTY_SOCKET=
 if [ $OS = unix ] && [ -n "$ENABLE_NETWORK" ]; then
 	echo $n "checking for sys/un.h... $c"
-	if [ -f /usr/include/sys/un.h ]
+	if [ -f @TERMUX_PREFIX@/include/sys/un.h ]
 	then echo yes ; TTY_SOCKET=y
 	else echo no
 	fi