diff --git a/spinup/run.py b/spinup/run.py
index 60ea25dd4..0482cb506 100644
--- a/spinup/run.py
+++ b/spinup/run.py
@@ -221,7 +221,7 @@ def process(arg):
     elif cmd in valid_utils:
         # Execute the correct utility file.
         runfile = osp.join(osp.abspath(osp.dirname(__file__)), 'utils', cmd +'.py')
-        args = ['python', runfile] + sys.argv[2:]
+        args = [sys.executable if sys.executable else 'python', runfile] + sys.argv[2:]
         subprocess.check_call(args, env=os.environ)
     else:
         # Assume that the user plans to execute an algorithm. Run custom