diff --git a/runtime/internal/lib/go/build/build.go b/runtime/internal/lib/go/build/build.go
index b79c5a69..a2f5f2ce 100644
--- a/runtime/internal/lib/go/build/build.go
+++ b/runtime/internal/lib/go/build/build.go
@@ -41,7 +41,26 @@ func parseGoVersion() int {
 
 var goVersion = parseGoVersion()
 
+// defaultToolTags should be an internal detail,
+// but widely used packages access it using linkname.
+// Notable members of the hall of shame include:
+//   - github.com/gopherjs/gopherjs
+//
+// Do not remove or change the type signature.
+// See go.dev/issue/67401.
+//
+//go:linkname defaultToolTags
 var defaultToolTags []string
+
+// defaultReleaseTags should be an internal detail,
+// but widely used packages access it using linkname.
+// Notable members of the hall of shame include:
+//   - github.com/gopherjs/gopherjs
+//
+// Do not remove or change the type signature.
+// See go.dev/issue/67401.
+//
+//go:linkname defaultReleaseTags
 var defaultReleaseTags []string
 
 // defaultContext returns the default Context for builds.