diff -uNr nmap-7.70/ncat/ncat_connect.c nmap-7.70.mod/ncat/ncat_connect.c
--- nmap-7.70/ncat/ncat_connect.c	2018-01-28 23:18:17.000000000 +0200
+++ nmap-7.70.mod/ncat/ncat_connect.c	2019-03-02 01:35:44.977992954 +0200
@@ -1005,7 +1005,7 @@
               char *tmpdir = getenv("TMPDIR");
               size_t size=0, offset=0;
               strbuf_sprintf(&tmp_name, &size, &offset, "%s/ncat.XXXXXX",
-                  tmpdir ? tmpdir : "/tmp");
+                  tmpdir ? tmpdir : "@TERMUX_PREFIX@/tmp");
               if (mkstemp(tmp_name) == -1) {
                 bye("Failed to create name for temporary DGRAM source Unix domain socket (mkstemp).");
               }
diff -uNr nmap-7.70/ncat/ncat_main.c nmap-7.70.mod/ncat/ncat_main.c
--- nmap-7.70/ncat/ncat_main.c	2018-03-05 03:53:34.000000000 +0200
+++ nmap-7.70.mod/ncat/ncat_main.c	2019-03-02 01:35:44.977992954 +0200
@@ -999,8 +999,8 @@
 
 #ifndef WIN32
     /* See if the shell is executable before we get deep into this */
-    if (o.execmode == EXEC_SHELL && access("/bin/sh", X_OK) == -1)
-        bye("/bin/sh is not executable, so `-c' won't work.");
+    if (o.execmode == EXEC_SHELL && access("@TERMUX_PREFIX@/bin/sh", X_OK) == -1)
+        bye("@TERMUX_PREFIX@/bin/sh is not executable, so `-c' won't work.");
 #endif
 
     if (targetaddrs->addr.storage.ss_family != AF_UNSPEC) {
diff -uNr nmap-7.70/ncat/ncat_posix.c nmap-7.70.mod/ncat/ncat_posix.c
--- nmap-7.70/ncat/ncat_posix.c	2018-01-28 23:18:17.000000000 +0200
+++ nmap-7.70.mod/ncat/ncat_posix.c	2019-03-02 01:35:44.981326300 +0200
@@ -239,7 +239,7 @@
         char **cmdargs;
 
         case EXEC_SHELL:
-            execl("/bin/sh", "sh", "-c", cmdexec, (void *) NULL);
+            execl("@TERMUX_PREFIX@/bin/sh", "sh", "-c", cmdexec, (void *) NULL);
             break;
 #ifdef HAVE_LUA
         case EXEC_LUA:
diff -uNr nmap-7.70/nmap_dns.cc nmap-7.70.mod/nmap_dns.cc
--- nmap-7.70/nmap_dns.cc	2018-01-28 23:18:17.000000000 +0200
+++ nmap-7.70.mod/nmap_dns.cc	2019-03-02 01:35:44.981326300 +0200
@@ -1016,9 +1016,9 @@
   char fmt[32];
   char ipaddr[INET6_ADDRSTRLEN+1];
 
-  fp = fopen("/etc/resolv.conf", "r");
+  fp = fopen("@TERMUX_PREFIX@/etc/resolv.conf", "r");
   if (fp == NULL) {
-    if (firstrun) error("mass_dns: warning: Unable to open /etc/resolv.conf. Try using --system-dns or specify valid servers with --dns-servers");
+    if (firstrun) error("mass_dns: warning: Unable to open $PREFIX/etc/resolv.conf. Try using --system-dns or specify valid servers with --dns-servers");
     return;
   }
 
@@ -1099,7 +1099,7 @@
   parse_etchosts(tpbuf);
 
 #else
-  parse_etchosts("/etc/hosts");
+  parse_etchosts("@TERMUX_PREFIX@/etc/hosts");
 #endif // WIN32
 }
 
diff -uNr nmap-7.70/protocols.cc nmap-7.70.mod/protocols.cc
--- nmap-7.70/protocols.cc	2018-01-28 23:18:17.000000000 +0200
+++ nmap-7.70.mod/protocols.cc	2019-03-02 01:37:23.878379187 +0200
@@ -156,8 +156,8 @@
   int res;
 
   if (nmap_fetchfile(filename, sizeof(filename), "nmap-protocols") != 1) {
-    error("Unable to find nmap-protocols!  Resorting to /etc/protocols");
-    strcpy(filename, "/etc/protocols");
+    error("Unable to find nmap-protocols!  Resorting to @TERMUX_PREFIX@/etc/protocols");
+    strcpy(filename, "@TERMUX_PREFIX@/etc/protocols");
   }
 
   fp = fopen(filename, "r");
diff -uNr nmap-7.70/services.cc nmap-7.70.mod/services.cc
--- nmap-7.70/services.cc	2018-01-28 23:18:17.000000000 +0200
+++ nmap-7.70.mod/services.cc	2019-03-02 01:36:46.291565552 +0200
@@ -202,8 +202,8 @@
 
   if (nmap_fetchfile(filename, sizeof(filename), "nmap-services") != 1) {
 #ifndef WIN32
-    error("Unable to find nmap-services!  Resorting to /etc/services");
-    strcpy(filename, "/etc/services");
+    error("Unable to find nmap-services!  Resorting to @TERMUX_PREFIX@/etc/services");
+    strcpy(filename, "@TERMUX_PREFIX@/etc/services");
 #else
         int len, wnt = GetVersion() < 0x80000000;
     error("Unable to find nmap-services!  Resorting to /etc/services");