minor fixes

INSTALL.md

@@ -21,9 +21,9 @@ Radiance requires further requires Go 1.19. Using Go 1.18 or Go 1.20 will not wo
 Here's a trick to download another Go version in case you have the wrong one.
 (See [Managing Go versions](https://golang.org/doc/manage-install))
 
-    go get golang.org/dl/go1.19.8
-    go1.19.8 download
-    alias go=go1.19.8
+    go install golang.org/dl/go1.19.8@latest
+    "$(go env GOPATH)/bin/go1.19.8" download
+    alias go="$(go env GOPATH)/bin/go1.19.8"
 
 Once your Go toolchain and build dependencies are installed, you can build Radiance as usual:
 

cmd/tpu/proxy/proxy.go

@@ -1,3 +1,5 @@
+//go:build linux
+
 package main
 
 import (

pkg/nftables/nftables.go

@@ -1,3 +1,5 @@
+//go:build linux
+
 package nftables
 
 import (

pkg/poh/poh_test.go

@@ -62,7 +62,8 @@ func TestState(t *testing.T) {
 			},
 		},
 	}
-	for name, tc := range cases {
+	for name, tc_ := range cases {
+		tc := tc_
 		t.Run(name, func(t *testing.T) {
 			t.Parallel()
 			state := State(mustHashFromHex(tc.pre))