diff --git a/beacon_chain/beacon_node.nim b/beacon_chain/beacon_node.nim
index c03b5a544..5992fba4d 100644
--- a/beacon_chain/beacon_node.nim
+++ b/beacon_chain/beacon_node.nim
@@ -28,10 +28,6 @@ declareGauge beacon_head_slot,
 declareGauge beacon_head_root,
   "Root of the head block of the beacon chain"
 
-# https://github.com/ethereum/eth2.0-metrics/blob/master/metrics.md#additional-metrics
-declareGauge beacon_pending_exits,
-  "Number of pending voluntary exits in local operation pool" # On slot
-
 # Metrics for tracking attestation and beacon block loss
 declareCounter beacon_attestations_sent,
   "Number of beacon chain attestations sent by this peer"
@@ -399,7 +395,7 @@ proc proposeBlock(node: BeaconNode,
     var
       tmpState = hashedState
 
-    let ok = state_transition(tmpState, newBlock, {skipValidation})
+    discard state_transition(tmpState, newBlock, {skipValidation})
     # TODO only enable in fast-fail debugging situations
     # otherwise, bad attestations can bring down network
     # doAssert ok # TODO: err, could this fail somehow?
diff --git a/tests/official/test_fixture_sanity_blocks.nim b/tests/official/test_fixture_sanity_blocks.nim
index 50013389e..df4e5e706 100644
--- a/tests/official/test_fixture_sanity_blocks.nim
+++ b/tests/official/test_fixture_sanity_blocks.nim
@@ -36,7 +36,6 @@ template runValidTest(testName: string, identifier: untyped, num_blocks: int): u
       stateRef[] = parseTest(testDir/"pre.ssz", SSZ, BeaconState)
       postRef[] = parseTest(testDir/"post.ssz", SSZ, BeaconState)
 
-      var success = true
       for i in 0 ..< num_blocks:
         let blck = parseTest(testDir/"blocks_" & $i & ".ssz", SSZ, BeaconBlock)
 
diff --git a/tests/official/test_fixture_ssz_consensus_objects.nim b/tests/official/test_fixture_ssz_consensus_objects.nim
index 8f79e00e9..eaa53630c 100644
--- a/tests/official/test_fixture_ssz_consensus_objects.nim
+++ b/tests/official/test_fixture_ssz_consensus_objects.nim
@@ -7,7 +7,7 @@
 
 import
   # Standard library
-  os, unittest, strutils, streams, strformat, strscans,
+  os, unittest, strutils, streams, strformat,
   macros, sets,
   # Status libraries
   stint, stew/bitseqs,
diff --git a/vendor/nim-nat-traversal b/vendor/nim-nat-traversal
index 42c0c5020..68ed95957 160000
--- a/vendor/nim-nat-traversal
+++ b/vendor/nim-nat-traversal
@@ -1 +1 @@
-Subproject commit 42c0c5020e4826f8a5aa324c2c77de4804c92436
+Subproject commit 68ed95957d614fa91d0b20bdeea3cf876c46c120
diff --git a/vendor/nimbus-build-system b/vendor/nimbus-build-system
index 351b68fd9..798b10191 160000
--- a/vendor/nimbus-build-system
+++ b/vendor/nimbus-build-system
@@ -1 +1 @@
-Subproject commit 351b68fd946f3df136af3c74d1f82a5a232e9934
+Subproject commit 798b1019105a80fe0f1b49e9f95a4bbab4c29e70