--- a/ckufio.c
+++ b/ckufio.c
@@ -990,7 +990,7 @@
 int ckxpriv = 1;			/* Priv'd login ok */
 
 #ifndef XFERFILE
-#define XFERFILE "/var/log/iksd.log"
+#define XFERFILE "@TERMUX_PREFIX@/var/log/iksd.log"
 #endif /* XFERFILE */
 
 /* wtmp logging for IKSD... */
@@ -1095,7 +1095,7 @@
 #define WTMPFILE "/usr/adm/wtmp.1"
 #else
 #ifdef LINUX
-#define WTMPFILE "/var/log/wtmp"
+#define WTMPFILE "@TERMUX_PREFIX@/var/log/wtmp"
 #else
 #define WTMPFILE "/usr/adm/wtmp"
 #endif /* QNX */
@@ -3322,7 +3322,7 @@
 #ifdef Plan9
         defshell = "/bin/rc";
 #else
-        defshell = "/bin/sh";
+        defshell = "@TERMUX_PREFIX@/bin/sh";
 #endif /* Plan9 */
 #endif /* HPUX10 */
 #endif /* aegis */
@@ -3351,7 +3351,7 @@
 
 #ifdef aegis
         if ((shpath = getenv("SERVERSHELL")) == NULL)
-          shpath = "/bin/sh";
+          shpath = "@TERMUX_PREFIX@/bin/sh";
 #else
         shpath = getenv("SHELL");       /* What shell? */
         if (shpath == NULL) {
@@ -6865,8 +6865,8 @@
     execl("/bin/rc", "rc", "-c", s, NULL);
     perror("/bin/rc");
 #else
-    execl("/bin/sh","sh","-c",s,NULL);
-    perror("/bin/sh");
+    execl("@TERMUX_PREFIX@/bin/sh","sh","-c",s,NULL);
+    perror("@TERMUX_PREFIX@/bin/sh");
 #endif /* Plan9 */
 #endif /* HPUX10 */
     _exit(255);
@@ -6957,7 +6957,7 @@
 #ifdef Plan9
         char *defshell = "/bin/rc";
 #else
-        char *defshell = "/bin/sh";
+        char *defshell = "@TERMUX_PREFIX@/bin/sh";
 #endif /* Plan9 */
 #endif /* HPUX10 */
         if (priv_can()) exit(1);        /* Turn off privs. */
@@ -7748,10 +7748,10 @@
   outside of UNIX, it should be spread out among the ck?fio.c modules...
 */
 #ifndef _PATH_BSHELL
-#define _PATH_BSHELL    "/usr/bin/bash"
+#define _PATH_BSHELL    "@TERMUX_PREFIX@/bin/bash"
 #endif /* _PATH_BSHELL */
 #ifndef _PATH_FTPUSERS
-#define _PATH_FTPUSERS  "/etc/ftpusers"
+#define _PATH_FTPUSERS  "@TERMUX_PREFIX@/etc/ftpusers"
 #endif /* _PATH_FTPUSERS */
 
 /*