diff -ru -x '*.Po' -x '*.Plo' findutils-4.5.9.orig/lib/buildcmd.c findutils-4.5.9/lib/buildcmd.c
--- findutils-4.5.9.orig/lib/buildcmd.c	2010-10-22 15:16:25 +0200
+++ findutils-4.5.9/lib/buildcmd.c	2010-10-22 16:17:02 +0200
@@ -446,7 +446,9 @@
   /* XXX: better to do a compile-time check */
   assert ( (~(size_t)0) >= LONG_MAX);
 
-#ifdef _SC_ARG_MAX
+  /* on interix, _SC_ARG_MAX returns 1MB, which is too much. 
+   * ARG_MAX instead is 14500, which works just fine. */
+#if defined(_SC_ARG_MAX) && !defined(__INTERIX)
   val = sysconf (_SC_ARG_MAX);
 #else
   val = -1;