diff --git a/dashboard/builders.go b/dashboard/builders.go
index 4076864..1367b9e 100644
--- a/dashboard/builders.go
+++ b/dashboard/builders.go
@@ -25,7 +25,6 @@
 // syntax entirely. This is a first draft.
 var slowBotAliases = map[string]string{
 	// Known missing builders:
-	"netbsd-arm64":  "",
 	"openbsd-arm":   "",
 	"openbsd-arm64": "",
 	"nacl-arm":      "",
@@ -80,6 +79,7 @@
 	"netbsd-386":     "netbsd-386-9_0",
 	"netbsd-amd64":   "netbsd-amd64-9_0",
 	"netbsd-arm":     "netbsd-arm-bsiegert",
+	"netbsd-arm64":   "netbsd-arm64-bsiegert",
 	"openbsd":        "openbsd-amd64-64",
 	"openbsd-386":    "openbsd-386-64",
 	"openbsd-amd64":  "openbsd-amd64-64",
@@ -318,6 +318,12 @@
 		env:         []string{"GOROOT_BOOTSTRAP=/usr/pkg/go112"},
 		OwnerGithub: "bsiegert",
 	},
+	"host-netbsd-arm64-bsiegert": &HostConfig{
+		IsReverse:   true,
+		ExpectNum:   1,
+		env:         []string{"GOROOT_BOOTSTRAP=/usr/pkg/go114"},
+		OwnerGithub: "bsiegert",
+	},
 	"host-dragonfly-amd64-5_8": &HostConfig{
 		IsReverse:   true,
 		ExpectNum:   1,
@@ -1930,6 +1936,16 @@
 		},
 	})
 	addBuilder(BuildConfig{
+		Name:           "netbsd-arm64-bsiegert",
+		HostType:       "host-netbsd-arm64-bsiegert",
+		distTestAdjust: noTestDirAndNoReboot,
+		tryBot:         nil,
+		env: []string{
+			// The machine is slow.
+			"GO_TEST_TIMEOUT_SCALE=10",
+		},
+	})
+	addBuilder(BuildConfig{
 		Name:           "plan9-386",
 		HostType:       "host-plan9-386-gce",
 		numTestHelpers: 1,