--- third_party/BUILD.orig	2019-07-11 08:41:05.213918000 +0000
+++ third_party/BUILD	2019-07-11 08:41:40.502181000 +0000
@@ -536,7 +536,7 @@
     name = "filter_netty_dynamic_libs",
     srcs = ["netty_tcnative/netty-tcnative-boringssl-static-2.0.24.Final.jar"],
     outs = ["netty_tcnative/netty-tcnative-filtered.jar"],
-    cmd = "cp $< $@ && zip -qd $@ " + UNNECESSARY_DYNAMIC_LIBRARIES,
+    cmd = "cp $< $@ && (zip -qd $@ " + UNNECESSARY_DYNAMIC_LIBRARIES + " || : )",
 )
 
 java_import(