diff --git a/metropolis/test/nanoswitch/BUILD b/metropolis/test/nanoswitch/BUILD
index ce22acd..74f2ddf 100644
--- a/metropolis/test/nanoswitch/BUILD
+++ b/metropolis/test/nanoswitch/BUILD
@@ -37,5 +37,8 @@
         # CA Certificate bundle
         "@cacerts//file": "/etc/ssl/cert.pem",
     },
+    fsspecs = [
+        "//metropolis/node/build:earlydev.fsspec",
+    ],
     visibility = ["//metropolis/test:__subpackages__"],
 )