diff --git a/lbt_recipes/recipe.py b/lbt_recipes/recipe.py
index 39eb0c94..4c189840 100644
--- a/lbt_recipes/recipe.py
+++ b/lbt_recipes/recipe.py
@@ -310,14 +310,18 @@ def run(self, settings=None, radiance_check=False, openstudio_check=False,
 
         # execute command
         shell = False if os.name == 'nt' and not silent else True
+        custom_env = os.environ.copy()
+        custom_env['PYTHONHOME'] = ''
         if settings.report_out:
             process = subprocess.Popen(
-                command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=shell)
+                command, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
+                shell=shell, env=custom_env
+            )
             result = process.communicate()
             print(result[0])
             print(result[1])
         else:
-            process = subprocess.Popen(command, shell=shell)
+            process = subprocess.Popen(command, shell=shell, env=custom_env)
             result = process.communicate()  # freeze the canvas while running
         return folder