diff --git a/lib/tmpdir.c b/lib/tmpdir.c
index a1473e2..19267bd 100644
--- a/lib/tmpdir.c
+++ b/lib/tmpdir.c
@@ -35,7 +35,7 @@
 # ifdef _P_tmpdir /* native Windows */
 #  define P_tmpdir _P_tmpdir
 # else
-#  define P_tmpdir "/tmp"
+#  define P_tmpdir "@TERMUX_PREFIX@/tmp"
 # endif
 #endif
 
@@ -131,8 +131,8 @@ path_search (char *tmpl, size_t tmpl_len, const char *dir, const char *pfx,
 #endif
       if (direxists (P_tmpdir))
         dir = P_tmpdir;
-      else if (strcmp (P_tmpdir, "/tmp") != 0 && direxists ("/tmp"))
-        dir = "/tmp";
+      else if (strcmp (P_tmpdir, "@TERMUX_PREFIX@/tmp") != 0 && direxists ("@TERMUX_PREFIX@/tmp"))
+        dir = "@TERMUX_PREFIX@/tmp";
       else
         {
           __set_errno (ENOENT);
diff --git a/src/mktemp.c b/src/mktemp.c
index 72523be..94e0f08 100644
--- a/src/mktemp.c
+++ b/src/mktemp.c
@@ -92,7 +92,7 @@ Files are created u+rw, and directories u+rwx, minus umask restrictions.\n\
       oputs (_("\
   -p DIR, --tmpdir[=DIR]\n\
          interpret TEMPLATE relative to DIR;\n\
-         if DIR is not specified, use $TMPDIR if set, else /tmp.\n\
+         if DIR is not specified, use $TMPDIR if set, else @TERMUX_PREFIX@/tmp.\n\
          With this option, TEMPLATE must not be an absolute name;\n\
          unlike with -t, TEMPLATE may contain slashes,\n\
          but mktemp creates only the final component\n\
@@ -101,7 +101,7 @@ Files are created u+rw, and directories u+rwx, minus umask restrictions.\n\
   -t\n\
          interpret TEMPLATE as a single file name component,\n\
          relative to a directory: $TMPDIR, if set;\n\
-         else the directory specified via -p; else /tmp [deprecated]\n\
+         else the directory specified via -p; else @TERMUX_PREFIX@/tmp [deprecated]\n\
 "));
       oputs (HELP_OPTION_DESCRIPTION);
       oputs (VERSION_OPTION_DESCRIPTION);
@@ -283,7 +283,7 @@ main (int argc, char **argv)
           else if (dest_dir_arg && *dest_dir_arg)
             dest_dir = dest_dir_arg;
           else
-            dest_dir = "/tmp";
+            dest_dir = "@TERMUX_PREFIX@/tmp";
 
           if (last_component (template) != template)
             error (EXIT_FAILURE, 0,
@@ -297,7 +297,7 @@ main (int argc, char **argv)
           else
             {
               char *env = getenv ("TMPDIR");
-              dest_dir = (env && *env ? env : "/tmp");
+              dest_dir = (env && *env ? env : "@TERMUX_PREFIX@/tmp");
             }
           if (IS_ABSOLUTE_FILE_NAME (template))
             error (EXIT_FAILURE, 0,
diff --git a/src/sort.c b/src/sort.c
index eaf06d2..99f9a9d 100644
--- a/src/sort.c
+++ b/src/sort.c
@@ -81,9 +81,7 @@ struct rlimit { size_t rlim_cur; };
 
 #define UCHAR_LIM (UCHAR_MAX + 1)
 
-#ifndef DEFAULT_TMPDIR
-# define DEFAULT_TMPDIR "/tmp"
-#endif
+#define DEFAULT_TMPDIR "@TERMUX_PREFIX@/tmp"
 
 /* Maximum number of lines to merge every time a NODE is taken from
    the merge queue.  Node is at LEVEL in the binary merge tree,
diff --git a/src/split.c b/src/split.c
index aca6432..de989ae 100644
--- a/src/split.c
+++ b/src/split.c
@@ -308,7 +308,7 @@ CHUNKS may be:\n\
   r/K/N   likewise but only output Kth of N to standard output\n\
 "), stdout);
       fputs (_("\n\
--n (except -nr) will buffer to $TMPDIR, defaulting to /tmp,\n\
+-n (except -nr) will buffer to $TMPDIR, defaulting to @TERMUX_PREFIX@/tmp,\n\
 if the input size cannot easily be determined.\n\
 "), stdout);
       emit_ancillary_info (PROGRAM_NAME);
@@ -593,7 +593,7 @@ create (char const *name)
 
       char const *shell_prog = getenv ("SHELL");
       if (shell_prog == NULL)
-        shell_prog = "/bin/sh";
+        shell_prog = "@TERMUX_PREFIX@/bin/sh";
       char const *const argv[] = { last_component (shell_prog), "-c",
                                    filter_command, NULL };
 
diff --git a/src/tac.c b/src/tac.c
index 161a5ea..5436f42 100644
--- a/src/tac.c
+++ b/src/tac.c
@@ -138,7 +138,7 @@ Write each FILE to standard output, last line first.\n\
       oputs (HELP_OPTION_DESCRIPTION);
       oputs (VERSION_OPTION_DESCRIPTION);
       fputs (_("\n\
-Non-seekable input is buffered to $TMPDIR, defaulting to /tmp.\n\
+Non-seekable input is buffered to $TMPDIR, defaulting to @TERMUX_PREFIX@/tmp.\n\
 "), stdout);
       emit_ancillary_info (PROGRAM_NAME);
     }