adjust target os specific build tags

src/runtime/netpoll.go

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux
+
 package runtime
 
 // For debugging purposes this is used for all target architectures, but this is only valid for linux systems.

src/runtime/netpoll_generic.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (js && wasm) || wasip1 || windows
+//go:build !linux
 
 package runtime
 

src/syscall/forklock_tinygo.go

@@ -1,4 +1,4 @@
-//go:build tinygo
+//go:build tinygo && linux
 
 package syscall
 
@@ -35,4 +35,4 @@ func SetNonblock(fd int, nonblocking bool) (err error) {
 	return system.SetNonblock(fd, nonblocking)
 }
 
-type SysProcAttr struct{}
+// type SysProcAttr struct{}