diff --git a/scripts/dev/smoke-test.sh b/scripts/dev/smoke-test.sh
index e81e1b8..f6dee74 100644
--- a/scripts/dev/smoke-test.sh
+++ b/scripts/dev/smoke-test.sh
@@ -122,8 +122,12 @@ if [ "$env" = "dev" ]; then
     # Export for docker-compose to use
     export SMOKE_TEST_DATA_DIR
     
-    # Update compose project args to include env file with the data dir
-    compose_project_args=("--project-directory" "$repo_root" "--env-file" <(echo "SMOKE_TEST_DATA_DIR=$SMOKE_TEST_DATA_DIR"))
+    # Create env file for docker-compose (process substitution doesn't work)
+    env_file="$SMOKE_TEST_DATA_DIR/.env"
+    echo "SMOKE_TEST_DATA_DIR=$SMOKE_TEST_DATA_DIR" > "$env_file"
+    
+    # Update compose project args to include env file
+    compose_project_args=("--project-directory" "$repo_root" "--env-file" "$env_file")
 
     stack_name="dev"
     api_wait_seconds=180
@@ -150,8 +154,12 @@ else
     # Export for docker-compose to use
     export SMOKE_TEST_DATA_DIR
     
-    # Update compose project args to include env file with the data dir
-    compose_project_args=("--project-directory" "$repo_root" "--env-file" <(echo "SMOKE_TEST_DATA_DIR=$SMOKE_TEST_DATA_DIR"))
+    # Create env file for docker-compose (process substitution doesn't work)
+    env_file="$SMOKE_TEST_DATA_DIR/.env"
+    echo "SMOKE_TEST_DATA_DIR=$SMOKE_TEST_DATA_DIR" > "$env_file"
+    
+    # Update compose project args to include env file
+    compose_project_args=("--project-directory" "$repo_root" "--env-file" "$env_file")
 
     stack_name="prod"
     compose_files=("-f" "$repo_root/deployments/docker-compose.prod.smoke.yml")