diff -uNr tigervnc-1.9.0/unix/xserver/hw/vnc/xvnc.c tigervnc-1.9.0.mod/unix/xserver/hw/vnc/xvnc.c
--- tigervnc-1.9.0/unix/xserver/hw/vnc/xvnc.c	2018-07-16 17:08:55.000000000 +0300
+++ tigervnc-1.9.0.mod/unix/xserver/hw/vnc/xvnc.c	2018-09-12 11:14:21.789657049 +0300
@@ -339,13 +339,13 @@
     char file[256];
     if (vncIsTCPPortUsed(6000+num))
         return FALSE;
-    sprintf(file, "/tmp/.X%d-lock", num);
+    sprintf(file, "@TERMUX_PREFIX@/tmp/.X%d-lock", num);
     if (access(file, F_OK) == 0)
         return FALSE;
-    sprintf(file, "/tmp/.X11-unix/X%d", num);
+    sprintf(file, "@TERMUX_PREFIX@/tmp/.X11-unix/X%d", num);
     if (access(file, F_OK) == 0)
         return FALSE;
-    sprintf(file, "/usr/spool/sockets/X11/%d", num);
+    sprintf(file, "@TERMUX_PREFIX@/spool/sockets/X11/%d", num);
     if (access(file, F_OK) == 0)
         return FALSE;
     return TRUE;