diff --git a/beacon_chain/beacon_node.nim b/beacon_chain/beacon_node.nim
index 54e588823..2d3d89971 100644
--- a/beacon_chain/beacon_node.nim
+++ b/beacon_chain/beacon_node.nim
@@ -1,9 +1,9 @@
 import
   # Standard library
-  net, sequtils, tables, osproc, random, strutils, times, strformat,
+  os, net, sequtils, tables, osproc, random, strutils, times, strformat,
 
   # Nimble packages
-  stew/shims/os, stew/[objects, bitseqs],
+  stew/[objects, bitseqs],
   chronos, chronicles, confutils, metrics,
   json_serialization/std/[options, sets], serialization/errors,
   eth/trie/db, eth/trie/backends/rocksdb_backend, eth/async_utils,
diff --git a/tests/simulation/run_node.sh b/tests/simulation/run_node.sh
index b966aa5fd..25da2d633 100755
--- a/tests/simulation/run_node.sh
+++ b/tests/simulation/run_node.sh
@@ -40,6 +40,6 @@ $BEACON_NODE_BIN \
   --depositContractAddress=$DEPOSIT_CONTRACT_ADDRESS \
   --metricsServer=true \
   --metricsServerAddress="127.0.0.1" \
-  --metricsServerPort="$(( $BASE_METRICS_PORT + $NODE_ID ))"
+  --metricsServerPort="$(( $BASE_METRICS_PORT + $NODE_ID ))" \
   "$@"
 
diff --git a/tests/simulation/start.sh b/tests/simulation/start.sh
index 4805c1864..fae59ac3e 100755
--- a/tests/simulation/start.sh
+++ b/tests/simulation/start.sh
@@ -86,6 +86,12 @@ scrape_configs:
     static_configs:
 EOF
 
+PROCESS_DASHBOARD_BIN="${SIM_ROOT}/../../build/process_dashboard"
+
+if [ ! -f "$PROCESS_DASHBOARD_BIN" ]; then
+  nim c -d:release --outdir:build tests/simulation/process_dashboard.nim
+fi
+
 # use the exported Grafana dashboard for a single node to create one for all nodes
 "${SIM_ROOT}/../../build/process_dashboard" \
   --nodes=${NUM_NODES} \