4 files changed, 6 insertions, 4 deletions
diff --git a/pkg/tcpip/sample/tun_tcp_connect/BUILD b/pkg/tcpip/sample/tun_tcp_connect/BUILD
index a57752a7c..cf0a5fefe 100644
--- a/pkg/tcpip/sample/tun_tcp_connect/BUILD
+++ b/pkg/tcpip/sample/tun_tcp_connect/BUILD
@@ -1,10 +1,11 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_binary")
+load("//tools:defs.bzl", "go_binary")
 
 package(licenses = ["notice"])
 
 go_binary(
     name = "tun_tcp_connect",
     srcs = ["main.go"],
+    visibility = ["//:sandbox"],
     deps = [
         "//pkg/tcpip",
         "//pkg/tcpip/buffer",
diff --git a/pkg/tcpip/sample/tun_tcp_connect/main.go b/pkg/tcpip/sample/tun_tcp_connect/main.go
index 2239c1e66..0ab089208 100644
--- a/pkg/tcpip/sample/tun_tcp_connect/main.go
+++ b/pkg/tcpip/sample/tun_tcp_connect/main.go
@@ -164,7 +164,7 @@ func main() {
 	// Create TCP endpoint.
 	var wq waiter.Queue
 	ep, e := s.NewEndpoint(tcp.ProtocolNumber, ipv4.ProtocolNumber, &wq)
-	if err != nil {
+	if e != nil {
 		log.Fatal(e)
 	}
 
diff --git a/pkg/tcpip/sample/tun_tcp_echo/BUILD b/pkg/tcpip/sample/tun_tcp_echo/BUILD
index dad8ef399..43264b76d 100644
--- a/pkg/tcpip/sample/tun_tcp_echo/BUILD
+++ b/pkg/tcpip/sample/tun_tcp_echo/BUILD
@@ -1,10 +1,11 @@
-load("@io_bazel_rules_go//go:def.bzl", "go_binary")
+load("//tools:defs.bzl", "go_binary")
 
 package(licenses = ["notice"])
 
 go_binary(
     name = "tun_tcp_echo",
     srcs = ["main.go"],
+    visibility = ["//:sandbox"],
     deps = [
         "//pkg/tcpip",
         "//pkg/tcpip/link/fdbased",
diff --git a/pkg/tcpip/sample/tun_tcp_echo/main.go b/pkg/tcpip/sample/tun_tcp_echo/main.go
index bca73cbb1..9e37cab18 100644
--- a/pkg/tcpip/sample/tun_tcp_echo/main.go
+++ b/pkg/tcpip/sample/tun_tcp_echo/main.go
@@ -168,7 +168,7 @@ func main() {
 	// Create TCP endpoint, bind it, then start listening.
 	var wq waiter.Queue
 	ep, e := s.NewEndpoint(tcp.ProtocolNumber, proto, &wq)
-	if err != nil {
+	if e != nil {
 		log.Fatal(e)
 	}