diff --git a/src/cmd/go/internal/cfg/cfg.go b/src/cmd/go/internal/cfg/cfg.go
index d583447cf6..a4edd854f1 100644
--- a/src/cmd/go/internal/cfg/cfg.go
+++ b/src/cmd/go/internal/cfg/cfg.go
@@ -227,6 +227,8 @@ func ForceHost() {
 	// Recompute the build context using Goos and Goarch to
 	// set the correct value for ctx.CgoEnabled.
 	BuildContext = defaultContext()
+	// Call SetGOROOT to properly set the GOROOT on the new context.
+	SetGOROOT(Getenv("GOROOT"), false)
 	// Recompute experiments: the settings determined depend on GOOS and GOARCH.
 	// This will also update the BuildContext's tool tags to include the new
 	// experiment tags.