Patch by Kei Kebreau <kei@openmailbox.org>
Keeping "#define CHDIR" makes NetHack unable to find its scoreboard record.
The other two modifications enable building on Linux and building with the
ncurses library, respectively.

diff -r -u nethack-3.6.0.orig/include/config.h nethack-3.6.0/include/config.h
--- nethack-3.6.0.orig/include/config.h	2016-05-27 17:20:03.062318307 -0400
+++ nethack-3.6.0/include/config.h	2016-05-31 16:48:04.283642766 -0400
@@ -308,7 +308,6 @@
 #define INSURANCE /* allow crashed game recovery */
 
 #ifndef MAC
-#define CHDIR /* delete if no chdir() available */
 #endif
 
 #ifdef CHDIR
diff -r -u nethack-3.6.0.orig/include/unixconf.h nethack-3.6.0/include/unixconf.h
--- nethack-3.6.0.orig/include/unixconf.h	2016-05-27 17:20:03.062318307 -0400
+++ nethack-3.6.0/include/unixconf.h	2016-05-30 20:33:52.132273630 -0400
@@ -36,7 +36,7 @@
 #define NETWORK        /* if running on a networked system */
                        /* e.g. Suns sharing a playground through NFS */
 /* #define SUNOS4 */   /* SunOS 4.x */
-/* #define LINUX */    /* Another Unix clone */
+#define LINUX          /* Another Unix clone */
 /* #define CYGWIN32 */ /* Unix on Win32 -- use with case sensitive defines */
 /* #define GENIX */    /* Yet Another Unix Clone */
 /* #define HISX */     /* Bull Unix for XPS Machines */
diff -r -u nethack-3.6.0.orig/sys/unix/Makefile.src nethack-3.6.0/sys/unix/Makefile.src
--- nethack-3.6.0.orig/sys/unix/Makefile.src	2016-05-27 17:20:03.082318966 -0400
+++ nethack-3.6.0/sys/unix/Makefile.src	2016-06-05 12:30:33.301505514 -0400
@@ -238,7 +238,7 @@
 # WINTTYLIB = -ltermcap
 # WINTTYLIB = -lcurses
 # WINTTYLIB = -lcurses16
-# WINTTYLIB = -lncurses
+WINTTYLIB = -lncurses
 #WINTTYLIB = -ltermlib
 #
 # libraries for X11