--- scm.c.orig	Mon Oct 18 03:44:40 2010
+++ scm.c	Fri Dec  6 15:20:06 2013
@@ -723,6 +723,13 @@ void final_scm(freeall)
 # ifndef MSDOS			/* DJGPP defines both */
 #  define SYSTNAME "unix"
 # endif
+#else 
+# ifdef __unix__
+#  define DIRSEP "/"
+#  ifndef MSDOS			/* DJGPP defines both */
+#   define SYSTNAME "unix"
+#  endif
+# endif
 #endif
 #ifdef MWC
 # define SYSTNAME "coherent"