diff --git a/.buildkite/blob_nix.yml b/.buildkite/blob_nix.yml
new file mode 100644
--- /dev/null
+++ b/.buildkite/blob_nix.yml
@@ -0,0 +1,9 @@
+steps:
+  - label: ":nix: Blob (Darwin)"
+    command: >
+      nix develop -c cd services/blob
+      && mkdir build
+      && cd build cmake ..
+      && make -j
+    agents:
+      - 'nixdarwin=true'