diff --git a/script/bootstrap b/script/bootstrap
index 07bff55..15f2f8d 100755
--- a/script/bootstrap
+++ b/script/bootstrap
@@ -1,5 +1,8 @@
 #!/bin/bash -ex
 
+# We intend that the arch sub-repo should be the only dependency.
+go get -v -u golang.org/x/arch
+
 # Install golangci-lint
 golangci_lint_version='v1.12.3'
 curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $GOPATH/bin ${golangci_lint_version}