diff --git a/chain/src/pipe.rs b/chain/src/pipe.rs
index 6cfc934a5..c6d739178 100644
--- a/chain/src/pipe.rs
+++ b/chain/src/pipe.rs
@@ -244,7 +244,6 @@ fn validate_block(b: &Block, ctx: &mut BlockContext, ext: &mut sumtree::Extensio
 		rproof_root.hash != b.header.range_proof_root ||
 		kernel_root.hash != b.header.kernel_root {
 
-		ext.dump();
 		return Err(Error::InvalidRoot);
 	}
 
diff --git a/pow/Cargo.toml b/pow/Cargo.toml
index d48628a23..7b6034387 100644
--- a/pow/Cargo.toml
+++ b/pow/Cargo.toml
@@ -21,7 +21,7 @@ git = "https://github.com/mimblewimble/cuckoo-miner"
 tag="grin_integration_12"
 #path = "../../cuckoo-miner"
 #uncomment this feature to turn off plugin builds
-#features=["no-plugin-build"]
+features=["no-plugin-build"]
 
 [dev_dependencies]
 grin_chain = { path = "../chain"}