diff -r c040f992052f -r 1c52a0eeb952 vendor/golang.org/x/sys/unix/zerrors_darwin_arm64.go
--- a/vendor/golang.org/x/sys/unix/zerrors_darwin_arm64.go	Wed Sep 18 19:17:42 2019 +0200
+++ b/vendor/golang.org/x/sys/unix/zerrors_darwin_arm64.go	Sun Feb 16 18:54:01 2020 +0100
@@ -3,7 +3,7 @@
 
 // +build arm64,darwin
 
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs -- -m64 _const.go
 
 package unix
@@ -980,6 +980,7 @@
 	NET_RT_MAXID                      = 0xa
 	NET_RT_STAT                       = 0x4
 	NET_RT_TRASH                      = 0x5
+	NFDBITS                           = 0x20
 	NL0                               = 0x0
 	NL1                               = 0x100
 	NL2                               = 0x200