diff --git a/docker/coexecutor/Makefile b/docker/coexecutor/Makefile
index ab4ce34c..ee131111 100644
--- a/docker/coexecutor/Makefile
+++ b/docker/coexecutor/Makefile
@@ -4,4 +4,7 @@ docker-image:
 	cd ../..; make dist; cp dist/pulsar*whl docker/coexecutor
 
 all: docker-image
+	re='pulsar_app-([0-9]+.[0-9]+.[0-9]+).dev0-py2.py3-none-any.whl'
+        f='$(shell ls -1a | egrep '$(re)')'
+        version=$(shell if [[ $(f) =~ $(re) ]]; then echo "v${BASH_REMATCH[1]}"; else echo "unknown_version"; fi)
 	docker build -t 'galaxy/pulsar-pod-staging:0.1' .