Index: setup.py
===================================================================
--- setup.py	(revision 77092)
+++ setup.py	(working copy)
@@ -1088,7 +1088,7 @@
                 missing.append('resource')
 
             # Sun yellow pages. Some systems have the functions in libc.
-            if platform not in ['cygwin', 'atheos', 'qnx6']:
+            if platform not in ['cygwin', 'atheos', 'qnx6'] and find_file('rpcsvc/yp_prot.h', inc_dirs, []) is not None:
                 if (self.compiler_obj.find_library_file(lib_dirs, 'nsl')):
                     libs = ['nsl']
                 else: