c3-lang/libffi

diff --git a/configure.ac b/configure.ac
index ab0bdfb..edc5d72 100644
--- a/configure.ac
+++ b/configure.ac
@@ -91,8 +91,8 @@ m4_warn([obsolete],
   ISO C90 headers unconditionally.])dnl
 # Autoupdate added the next two lines to ensure that your configure
 # script's behavior did not change.  They are probably safe to remove.
-AC_CHECK_INCLUDES_DEFAULT
-AC_PROG_EGREP
+dnl AC_CHECK_INCLUDES_DEFAULT
+dnl AC_PROG_EGREP
 
 AC_CHECK_FUNCS(memcpy)
 AC_CHECK_HEADERS(alloca.h)