diff --git a/cmd/tailscale/depaware.txt b/cmd/tailscale/depaware.txt
index f525a99bd..4e15a0715 100644
--- a/cmd/tailscale/depaware.txt
+++ b/cmd/tailscale/depaware.txt
@@ -45,7 +45,7 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
      💣 tailscale.com/net/tshttpproxy                                from tailscale.com/derp/derphttp+
         tailscale.com/paths                                          from tailscale.com/cmd/tailscale/cli+
         tailscale.com/safesocket                                     from tailscale.com/cmd/tailscale/cli+
-        tailscale.com/syncs                                          from tailscale.com/net/interfaces+
+     💣 tailscale.com/syncs                                          from tailscale.com/net/interfaces+
         tailscale.com/tailcfg                                        from tailscale.com/cmd/tailscale/cli+
    W    tailscale.com/tsconst                                        from tailscale.com/net/interfaces
      💣 tailscale.com/tstime/mono                                    from tailscale.com/tstime/rate
diff --git a/cmd/tailscaled/depaware.txt b/cmd/tailscaled/depaware.txt
index 4e5ab8c59..53f79387c 100644
--- a/cmd/tailscaled/depaware.txt
+++ b/cmd/tailscaled/depaware.txt
@@ -132,7 +132,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         tailscale.com/portlist                                       from tailscale.com/ipn/ipnlocal
         tailscale.com/safesocket                                     from tailscale.com/ipn/ipnserver+
         tailscale.com/smallzstd                                      from tailscale.com/ipn/ipnserver+
-        tailscale.com/syncs                                          from tailscale.com/net/interfaces+
+     💣 tailscale.com/syncs                                          from tailscale.com/net/interfaces+
         tailscale.com/tailcfg                                        from tailscale.com/control/controlclient+
    W    tailscale.com/tsconst                                        from tailscale.com/net/interfaces
         tailscale.com/tstime                                         from tailscale.com/wgengine/magicsock
diff --git a/syncs/locked.go b/syncs/locked.go
index 9d3f411b4..2091064a4 100644
--- a/syncs/locked.go
+++ b/syncs/locked.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build go1.13 && !go1.16
-// +build go1.13,!go1.16
+//go:build go1.13 && !go1.18
+// +build go1.13,!go1.18
 
 // This file makes assumptions about the inner workings of sync.Mutex and sync.RWMutex.
 // This includes not just their memory layout but their invariants and functionality.
diff --git a/syncs/locked_test.go b/syncs/locked_test.go
index 032c45a07..6cc50e249 100644
--- a/syncs/locked_test.go
+++ b/syncs/locked_test.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build go1.13 && !go1.16
-// +build go1.13,!go1.16
+//go:build go1.13 && !go1.18
+// +build go1.13,!go1.18
 
 package syncs