diff --git a/relay/engines/env_builder.go b/relay/engines/env_builder.go
index a4fc2b7..57b2d83 100644
--- a/relay/engines/env_builder.go
+++ b/relay/engines/env_builder.go
@@ -38,6 +38,7 @@ func BuildEnvironment(request messages.ExecutionRequest, relayConfig config.Conf
 	vars["COG_CHAT_HANDLE"] = request.Requestor.Handle
 	vars["COG_PIPELINE_ID"] = request.PipelineID()
 	vars["COG_SERVICE_TOKEN"] = request.ServiceToken
+	vars["COG_SERVICES_ROOT"] = request.ServicesRoot
 	vars["COG_INVOCATION_ID"] = request.InvocationID
 
 	if request.InvocationStep != "" {
diff --git a/relay/messages/execution.go b/relay/messages/execution.go
index 97d8b7b..5af8a06 100644
--- a/relay/messages/execution.go
+++ b/relay/messages/execution.go
@@ -18,6 +18,7 @@ type ExecutionRequest struct {
 	Requestor      ChatUser               `json:"requestor"`
 	User           CogUser                `json:"user"`
 	ServiceToken   string                 `json:"service_token"`
+	ServicesRoot   string                 `json:"services_root"`
 	bundleName     string
 	commandName    string
 	pipelineID     string