--- a/quilt/setup.in
+++ b/quilt/setup.in
@@ -219,7 +219,7 @@
 		specdir=$PWD
 	fi
 
-	tmpdir=$(gen_tempfile -d ${VARTMPDIR:-/var/tmp}/${0##*/})
+	tmpdir=$(gen_tempfile -d ${VARTMPDIR:-@TERMUX_PREFIX@/tmp}/${0##*/})
 	mkdir -p $tmpdir || exit 1
 	add_exit_handler "rm -rf $tmpdir"
 	mkdir -p $tmpdir/bin