diff --git a/.gitea/workflows/deploy.yaml b/.gitea/workflows/deploy.yaml
index 1f8d859..6a1f67c 100644
--- a/.gitea/workflows/deploy.yaml
+++ b/.gitea/workflows/deploy.yaml
@@ -40,9 +40,9 @@ concurrency:
 
 env:
   # The chain spec: the miner credential path on the node host derives from it.
-  # Must agree with quantus/chain's deploy. Planck is a testnet; mainnet is
-  # expected 2026-09-09.
-  CHAIN: planck
+  # Must agree with lair/quantus's node deploy. Mainnet since 2026-09-09; the
+  # node writes the credentials under chains/mainnet/.
+  CHAIN: mainnet
   MINER_LINK_PORT: "9833"
   MINER_METRICS_PORT: "9900"
   # Fleet Prometheus host; the miner's exporter is unauthenticated and bound to