diff --git a/packages/cosmic-swingset/Dockerfile b/packages/cosmic-swingset/Dockerfile
index 58f8a876b7c..eb268d57e10 100644
--- a/packages/cosmic-swingset/Dockerfile
+++ b/packages/cosmic-swingset/Dockerfile
@@ -9,6 +9,7 @@ RUN go mod download
 
 COPY Makefile* *.go ./
 COPY app/ app/
+COPY bin/ bin/
 COPY x/ x/
 COPY cmd/ cmd/
 COPY lib/*.go lib/
diff --git a/packages/cosmic-swingset/Makefile b/packages/cosmic-swingset/Makefile
index 733b150c4e9..c33b9bfe0bd 100644
--- a/packages/cosmic-swingset/Makefile
+++ b/packages/cosmic-swingset/Makefile
@@ -65,7 +65,7 @@ scenario1-run-chain:
 scenario1-run-client:
 	AG_SOLO_BASEDIR=t7 ve3/bin/ag-setup-solo --webhost=127.0.0.1:$(BASE_PORT)
 
-AGC = ./lib/ag-chain-cosmos
+AGC = ./bin/ag-chain-cosmos
 AGCH = ag-cosmos-helper
 scenario2-setup: all scenario2-setup-nobuild
 scenario2-setup-nobuild:
@@ -173,7 +173,7 @@ compile-gyp:
 install: go.sum
 	go install -v $(MOD_READONLY) $(BUILD_FLAGS) ./cmd/ag-cosmos-helper
 	bindir="$${GOBIN-$${GOPATH-$$HOME/go}/bin}"; \
-	  ln -sf "$$PWD/lib/ag-chain-cosmos" "$$PWD/bin/ag-nchainz" "$$bindir/"
+	  ln -sf "$$PWD/bin/ag-chain-cosmos" "$$PWD/bin/ag-nchainz" "$$bindir/"
 
 go.sum: go.mod
 	@echo "--> Ensure dependencies have not been modified"
diff --git a/packages/cosmic-swingset/bin/ag-chain-cosmos b/packages/cosmic-swingset/bin/ag-chain-cosmos
new file mode 100755
index 00000000000..52e84678f87
--- /dev/null
+++ b/packages/cosmic-swingset/bin/ag-chain-cosmos
@@ -0,0 +1,13 @@
+#! /bin/bash
+real0=$(readlink "${BASH_SOURCE[0]}" || echo "${BASH_SOURCE[0]}")
+thisdir=$(cd "$(dirname -- "$real0")" && pwd -P)
+nodeFlags=()
+while test $# -gt 0; do
+  case "$1" in
+  --inspect*) nodeFlags+=( "$1" ) ;;
+  *) break ;;
+  esac
+  shift
+done
+
+exec node ${nodeFlags[@]} "$thisdir/../lib/chain-entrypoint.js" ${1+"$@"}
diff --git a/packages/cosmic-swingset/lib/ag-chain-cosmos b/packages/cosmic-swingset/lib/chain-entrypoint.js
old mode 100755
new mode 100644
similarity index 100%
rename from packages/cosmic-swingset/lib/ag-chain-cosmos
rename to packages/cosmic-swingset/lib/chain-entrypoint.js