Fix agent directory on macOS.
diff --git a/buildkite/bazelci.py b/buildkite/bazelci.py
index 14d9805..93b6f03 100644
--- a/buildkite/bazelci.py
+++ b/buildkite/bazelci.py
@@ -267,7 +267,7 @@
         "macos": {
             "name": "macOS",
             "emoji-name": ":darwin:",
-            "agent-directory": "/usr/local/var/buildkite-agent/builds/${BUILDKITE_AGENT_NAME}"
+            "agent-directory": "/Users/buildkite/builds/${BUILDKITE_AGENT_NAME}"
         },
         "windows": {
             "name": "Windows",