diff -ur cfengine-3.5.3.orig/configure.ac cfengine-3.5.3/configure.ac
--- cfengine-3.5.3.orig/configure.ac	2013-12-09 13:13:14.000000000 +0100
+++ cfengine-3.5.3/configure.ac	2014-02-27 12:36:55.179893570 +0100
@@ -1047,6 +1047,16 @@
 AM_SUBST_NOTMAKE(post_macros)
 
 dnl ######################################################################
+dnl Find the path to ifconfig
+dnl ######################################################################
+
+AC_PATH_PROG(IFCONFIG_PATH,ifconfig)
+if test x"$IFCONFIG_PATH" = x"" ; then
+  AC_MSG_ERROR([Cannot found the ifconfig binary.])
+fi
+AC_DEFINE_UNQUOTED(IFCONFIG_RUN, "$IFCONFIG_PATH -a", [the path to run ifconfig -a])
+
+dnl ######################################################################
 dnl Summarize
 dnl ######################################################################
 
diff -ur cfengine-3.5.3.orig/libpromises/unix.c cfengine-3.5.3/libpromises/unix.c
--- cfengine-3.5.3.orig/libpromises/unix.c	2013-12-09 13:13:14.000000000 +0100
+++ cfengine-3.5.3/libpromises/unix.c	2014-02-27 12:38:35.036608105 +0100
@@ -767,7 +767,7 @@
         return;
     }
 #else
-    if ((pp = cf_popen("/sbin/ifconfig -a", "r", true)) == NULL)
+    if ((pp = cf_popen(IFCONFIG_RUN, "r", true)) == NULL)
     {
         Log(LOG_LEVEL_VERBOSE, "Could not find interface info");
         return;
diff -ur cfengine-3.5.3.orig/libutils/config.h.in cfengine-3.5.3/libutils/config.h.in
--- cfengine-3.5.3.orig/libutils/config.h.in	2013-12-09 13:55:25.000000000 +0100
+++ cfengine-3.5.3/libutils/config.h.in	2014-02-27 12:39:41.537416111 +0100
@@ -914,3 +914,6 @@
 
 /* Define to rpl_vsnprintf if the replacement function should be used. */
 #undef vsnprintf
+
+/* Define to the path for running ifconfig -a */
+#undef IFCONFIG_RUN