diff --git a/build/params_2k.go b/build/params_2k.go
index c2da7223f..4af81f851 100644
--- a/build/params_2k.go
+++ b/build/params_2k.go
@@ -23,7 +23,7 @@ var NetworkBundle = "devnet"
 var BundleOverrides map[actorstypes.Version]string
 var ActorDebugging = true
 
-const GenesisNetworkVersion = network.Version18
+const GenesisNetworkVersion = network.Version20
 
 var UpgradeBreezeHeight = abi.ChainEpoch(-1)
 
@@ -122,7 +122,7 @@ func init() {
 	UpgradeHyggeHeight = getUpgradeHeight("LOTUS_HYGGE_HEIGHT", UpgradeHyggeHeight)
 	UpgradeLightningHeight = getUpgradeHeight("LOTUS_LIGHTNING_HEIGHT", UpgradeLightningHeight)
 	UpgradeThunderHeight = getUpgradeHeight("LOTUS_THUNDER_HEIGHT", UpgradeThunderHeight)
-	UpgradeWatermelonHeight = getUpgradeHeight("LOTUS_Watermelon_HEIGHT", UpgradeWatermelonHeight)
+	UpgradeWatermelonHeight = getUpgradeHeight("LOTUS_WATERMELON_HEIGHT", UpgradeWatermelonHeight)
 
 	BuildType |= Build2k
 
diff --git a/build/params_mainnet.go b/build/params_mainnet.go
index 846730ed2..0b3c0a254 100644
--- a/build/params_mainnet.go
+++ b/build/params_mainnet.go
@@ -111,7 +111,7 @@ func init() {
 		SetAddressNetwork(address.Mainnet)
 	}
 
-	if os.Getenv("LOTUS_DISABLE_Watermelon") == "1" {
+	if os.Getenv("LOTUS_DISABLE_WATERMELON") == "1" {
 		UpgradeWatermelonHeight = math.MaxInt64
 	}