Index: lib/libc/net/nsdispatch.c
===================================================================
--- lib/libc/net/nsdispatch.c
+++ lib/libc/net/nsdispatch.c
@@ -486,9 +486,19 @@
 		 */
 		mod.handle = nss_builtin_handle;
 		fn = reg_fn;
-	} else if (!is_dynamic())
+	} else if (!is_dynamic()) {
 		goto fin;
-	else {
+	} else if (strcmp(source, "cache") == 0 ||
+		   strcmp(source, "compat") == 0 ||
+		   strcmp(source, "dns") == 0 ||
+		   strcmp(source, "files") == 0 ||
+		   strcmp(source, "db") == 0 ||
+		   strcmp(source, "nis") == 0) {
+			/*
+			 * Avoid calling dlopen(3) for built-in modules.
+			*/
+			goto fin;
+	} else {
 		if (snprintf(buf, sizeof(buf), "nss_%s.so.%d", mod.name,
 		    NSS_MODULE_INTERFACE_VERSION) >= (int)sizeof(buf))
 			goto fin;