diff --git a/Makefile b/Makefile
index 3a9a7ac9d..740b69f58 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,7 @@ SHELL := bash # the shell used internally by "make"
 BUILD_SYSTEM_DIR := vendor/nimbus-build-system
 
 # we set its default value before LOG_LEVEL is used in "variables.mk"
+BUILD_LOG_LEVEL := DEBUG
 LOG_LEVEL := INFO
 
 LINK_PCRE := 0
@@ -435,7 +436,7 @@ pyrmont-vc: | pyrmont-build nimbus_validator_client
 
 ifneq ($(LOG_LEVEL), TRACE)
 pyrmont-dev:
-	+ "$(MAKE)" LOG_LEVEL=TRACE $@
+	+ "$(MAKE)" BUILD_LOG_LEVEL=TRACE LOG_LEVEL=TRACE $@
 else
 pyrmont-dev: | pyrmont-build
 	$(call CONNECT_TO_NETWORK_IN_DEV_MODE,pyrmont,nimbus_beacon_node)
diff --git a/vendor/nim-chronos b/vendor/nim-chronos
index c1f6e7276..25688cd0a 160000
--- a/vendor/nim-chronos
+++ b/vendor/nim-chronos
@@ -1 +1 @@
-Subproject commit c1f6e7276e3810cee4bf7358a36a3444fb4bd75e
+Subproject commit 25688cd0aa51f5e28c1e55dca1b3a9a73cb3dafa
diff --git a/vendor/nim-faststreams b/vendor/nim-faststreams
index 4f6c874c1..99e89eb1e 160000
--- a/vendor/nim-faststreams
+++ b/vendor/nim-faststreams
@@ -1 +1 @@
-Subproject commit 4f6c874c108871a1ab4c063ab4a8de2775f7a01d
+Subproject commit 99e89eb1e5c973ea5162342384408434b7f5715a
diff --git a/vendor/nim-serialization b/vendor/nim-serialization
index 5b11c4173..261de741b 160000
--- a/vendor/nim-serialization
+++ b/vendor/nim-serialization
@@ -1 +1 @@
-Subproject commit 5b11c4173159a15d52f0bb6a26a1aa2b40f0f2be
+Subproject commit 261de741b73601821cb6e749fc9b4092f1cc5377
diff --git a/vendor/nim-snappy b/vendor/nim-snappy
index 4c50008ab..be86aed2a 160000
--- a/vendor/nim-snappy
+++ b/vendor/nim-snappy
@@ -1 +1 @@
-Subproject commit 4c50008ab23db7197034d0146666c4a34447ab4d
+Subproject commit be86aed2ad76e8de27437129c6c8badbb7675d70
diff --git a/vendor/nimbus-build-system b/vendor/nimbus-build-system
index 9c4c4d3ac..8de1f8036 160000
--- a/vendor/nimbus-build-system
+++ b/vendor/nimbus-build-system
@@ -1 +1 @@
-Subproject commit 9c4c4d3acf8f13e8d973180548837cc738e14aa2
+Subproject commit 8de1f8036c12bfe8729e54b062c1325ff966e70f