diff --git a/nwp/assets/ecmwf/mars.py b/nwp/assets/ecmwf/mars.py
index e641132..ae57baf 100644
--- a/nwp/assets/ecmwf/mars.py
+++ b/nwp/assets/ecmwf/mars.py
@@ -1,5 +1,8 @@
+import os
 import subprocess
-from dagster import Config, OpExecutionContext, op, graph
+import sys
+
+from dagster import Config, OpExecutionContext, op
 from dagster_docker import execute_docker_container
 
 
@@ -33,27 +36,25 @@ def nwp_consumer_docker_op(context: OpExecutionContext, config: NWPConsumerConfi
 @op
 def nwp_consumer_download_op(context: OpExecutionContext, config: NWPConsumerConfig):
     process = subprocess.run(
-        ["nwp-consumer", "download",
+        [f"{os.path.dirname(sys.executable)}/nwp-consumer", "download",
          f'--source={config.source}', f'--from={config.date_from}', f'--to={config.date_to}',
          f'--rdir={config.raw_dir}', f'--zdir={config.zarr_dir}'],
-        stdout = subprocess.PIPE,
-        stderr = subprocess.PIPE,
+        capture_output=True,
         text=True
     )
-    code = process.returncode
     print(process.stdout)
     print(process.stderr)
+    process.check_returncode()
     return config
 
 @op
 def nwp_consumer_convert_op(context: OpExecutionContext, downloadedConfig: NWPConsumerConfig):
     process = subprocess.run(
-        ["nwp-consumer", "convert",
+        [f"{os.path.dirname(sys.executable)}/nwp-consumer", "convert",
          f'--source={downloadedConfig.source}', f'--from={downloadedConfig.date_from}',
          f'--to={downloadedConfig.date_to}',
          f'--rdir={downloadedConfig.raw_dir}', f'--zdir={downloadedConfig.zarr_dir}'],
-        stdout = subprocess.PIPE,
-        stderr = subprocess.PIPE,
+        capture_output=True,
         text=True
     )
     print(process.stdout)