diff -ura crafty-25.2.orig/chess.h crafty-25.2/chess.h
--- crafty-25.2.orig/chess.h	2016-10-28 06:11:42.000000000 +0300
+++ crafty-25.2/chess.h	2017-03-25 20:58:32.380031222 +0300
@@ -62,16 +62,16 @@
 #    endif
 #  endif
 #  if !defined(BOOKDIR)
-#    define   BOOKDIR      "."
+#    define   BOOKDIR      "/usr/share/crafty"
 #  endif
 #  if !defined(LOGDIR)
 #    define   LOGDIR       "."
 #  endif
 #  if !defined(TBDIR)
-#    define   TBDIR        "./syzygy"
+#    define   TBDIR        "/usr/share/crafty/syzygy"
 #  endif
 #  if !defined(RCDIR)
-#    define   RCDIR        "."
+#    define   RCDIR        "/etc"
 #  endif
 #  include "lock.h"
 #  define MAXPLY                                 129
diff -ura crafty-25.2.orig/option.c crafty-25.2/option.c
--- crafty-25.2.orig/option.c	2016-10-28 06:11:42.000000000 +0300
+++ crafty-25.2/option.c	2017-03-25 21:00:02.124519987 +0300
@@ -980,7 +980,7 @@
     char *readstat = (char *) -1;
     int lines = 0;
 
-    helpfile = fopen("crafty.hlp", "r");
+    helpfile = fopen(BOOKDIR"/crafty.hlp", "r");
     if (!helpfile) {
       printf("ERROR.  Unable to open \"crafty.hlp\" -- help unavailable\n");
       return 1;