diff --git a/os_windows.go b/os_non_unix.go
similarity index 55%
rename from os_windows.go
rename to os_non_unix.go
index daf4c77..b5ef86d 100644
--- a/os_windows.go
+++ b/os_non_unix.go
@@ -1,6 +1,6 @@
 package lua
 
 func clock(l *State) int {
-	Errorf(l, "os.clock not yet supported on Windows")
+	Errorf(l, "os.clock not yet supported")
 	panic("unreachable")
 }
diff --git a/unix.go b/unix.go
index 0c65651..c1d7db3 100644
--- a/unix.go
+++ b/unix.go
@@ -1,4 +1,4 @@
-// +build !windows
+// +build !windows,!wasm
 
 package lua