diff --git a/constants_unix.go b/constants_unix.go
index 57ab331..5d66424 100644
--- a/constants_unix.go
+++ b/constants_unix.go
@@ -1,3 +1,4 @@
+//go:build (darwin || dragonfly || freebsd || netbsd || openbsd) && !solaris && !illumos
 // +build darwin dragonfly freebsd netbsd openbsd
 // +build !solaris
 // +build !illumos
diff --git a/termenv_unix.go b/termenv_unix.go
index 3c48782..22553e6 100644
--- a/termenv_unix.go
+++ b/termenv_unix.go
@@ -1,3 +1,4 @@
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
 // +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package termenv