diff --git a/sweet/cmd/sweet/benchmark.go b/sweet/cmd/sweet/benchmark.go
index 7df6bf3..d4c09f9 100644
--- a/sweet/cmd/sweet/benchmark.go
+++ b/sweet/cmd/sweet/benchmark.go
@@ -105,10 +105,14 @@
 		allBenchmarksMap["etcd"],
 		allBenchmarksMap["go-build"],
 		allBenchmarksMap["gopher-lua"],
-		allBenchmarksMap["gvisor"],
+	}
+	if runtime.GOARCH == "amd64" {
+		m["default"] = append(m["default"], allBenchmarksMap["gvisor"])
+	}
+	m["default"] = append(m["default"],
 		allBenchmarksMap["markdown"],
 		allBenchmarksMap["tile38"],
-	}
+	)
 
 	for i := range allBenchmarks {
 		m["all"] = append(m["all"], &allBenchmarks[i])
diff --git a/sweet/harnesses/gvisor.go b/sweet/harnesses/gvisor.go
index 46b9780..f45cd07 100644
--- a/sweet/harnesses/gvisor.go
+++ b/sweet/harnesses/gvisor.go
@@ -21,6 +21,9 @@
 	if runtime.GOOS != "linux" {
 		return fmt.Errorf("requires Linux")
 	}
+	if runtime.GOARCH != "amd64" {
+		return fmt.Errorf("requires amd64")
+	}
 	return nil
 }