--- polkit-0.113/configure.ac
+++ polkit-0.113-optional-netgroup/configure.ac
@@ -158,7 +158,7 @@ AC_CHECK_LIB(expat,XML_ParserCreate,[EXP
 	     [AC_MSG_ERROR([Can't find expat library. Please install expat.])])
 AC_SUBST(EXPAT_LIBS)
 
-AC_CHECK_FUNCS(clearenv fdatasync)
+AC_CHECK_FUNCS(clearenv fdatasync getnetgrent)
 
 if test "x$GCC" = "xyes"; then
   LDFLAGS="-Wl,--as-needed $LDFLAGS"
--- polkit-0.113/src/polkitbackend/init.js
+++ polkit-0.113-optional-netgroup/src/polkitbackend/init.js
@@ -29,7 +29,10 @@ function Subject() {
     };
 
     this.isInNetGroup = function(netGroup) {
-        return polkit._userIsInNetGroup(this.user, netGroup);
+        if (polkit._userIsInNetGroup)
+            return polkit._userIsInNetGroup(this.user, netGroup);
+        else
+            return false;
     };
 
     this.toString = function() {
--- polkit-0.113/src/polkitbackend/polkitbackendinteractiveauthority.c
+++ polkit-0.113-optional-netgroup/src/polkitbackend/polkitbackendinteractiveauthority.c
@@ -2214,6 +2214,7 @@ get_users_in_group (PolkitIdentity
   return ret;
 }
 
+#ifdef HAVE_GETNETGRENT
 static GList *
 get_users_in_net_group (PolkitIdentity                    *group,
                         gboolean                           include_root)
@@ -2269,6 +2270,7 @@ get_users_in_net_group (PolkitIdentity
   endnetgrent ();
   return ret;
 }
+#endif
 
 /* ---------------------------------------------------------------------------------------------------- */
 
@@ -2355,10 +2357,12 @@ authentication_agent_initiate_challenge
         {
           user_identities = g_list_concat (user_identities, get_users_in_group (identity, FALSE));
         }
+#ifdef HAVE_GETNETGRENT
       else if (POLKIT_IS_UNIX_NETGROUP (identity))
         {
           user_identities =  g_list_concat (user_identities, get_users_in_net_group (identity, FALSE));
         }
+#endif
       else
         {
           g_warning ("Unsupported identity");
--- polkit-0.113/src/polkitbackend/polkitbackendjsauthority.c
+++ polkit-0.113-optional-netgroup/src/polkitbackend/polkitbackendjsauthority.c
@@ -189,13 +189,16 @@ static JSClass js_polkit_class = {
 
 static JSBool js_polkit_log (JSContext *cx, unsigned argc, jsval *vp);
 static JSBool js_polkit_spawn (JSContext *cx, unsigned argc, jsval *vp);
+#ifdef HAVE_GETNETGRENT
 static JSBool js_polkit_user_is_in_netgroup (JSContext *cx, unsigned argc, jsval *vp);
-
+#endif
 static JSFunctionSpec js_polkit_functions[] =
 {
   JS_FS("log",            js_polkit_log,            0, 0),
   JS_FS("spawn",          js_polkit_spawn,          0, 0),
+#ifdef HAVE_GETNETGRENT
   JS_FS("_userIsInNetGroup", js_polkit_user_is_in_netgroup,          0, 0),
+#endif
   JS_FS_END
 };
 
@@ -1498,7 +1501,7 @@ js_polkit_spawn (JSContext  *cx,
 
 /* ---------------------------------------------------------------------------------------------------- */
 
-
+#ifdef HAVE_GETNETGRENT
 static JSBool
 js_polkit_user_is_in_netgroup (JSContext  *cx,
                                unsigned    argc,
@@ -1535,7 +1538,7 @@ js_polkit_user_is_in_netgroup (JSContext
  out:
   return ret;
 }
-
+#endif
 
 
 /* ---------------------------------------------------------------------------------------------------- */
--- polkit-0.113/test/polkitbackend/test-polkitbackendjsauthority.c
+++ polkit-0.113-optional-netgroup/test/polkitbackend/test-polkitbackendjsauthority.c
@@ -137,12 +137,14 @@ test_get_admin_identities (void)
         "unix-group:users"
       }
     },
+#ifdef HAVE_GETNETGRENT
     {
       "net.company.action3",
       {
         "unix-netgroup:foo"
       }
     },
+#endif
   };
   guint n;
 
@@ -258,7 +260,7 @@ static const RulesTestCase rules_test_ca
     NULL,
     POLKIT_IMPLICIT_AUTHORIZATION_NOT_AUTHORIZED,
   },
-
+#if HAVE_GETNETGRENT
   /* check netgroup membership */
   {
     /* john is a member of netgroup 'foo', see test/etc/netgroup */
@@ -276,7 +278,7 @@ static const RulesTestCase rules_test_ca
     NULL,
     POLKIT_IMPLICIT_AUTHORIZATION_NOT_AUTHORIZED,
   },
-
+#endif
   /* spawning */
   {
     "spawning_non_existing_helper",