diff --git a/responder/cli.py b/responder/cli.py
index e6cac73c..1d4df745 100644
--- a/responder/cli.py
+++ b/responder/cli.py
@@ -29,7 +29,7 @@
 """
 
 import logging
-import shutil
+import os
 import subprocess
 import typing as t
 
@@ -56,7 +56,7 @@ def cli() -> None:
     run: bool = args["run"]
 
     if build:
-        subprocess.check_call([shutil.which("npm.exe"), "run", "build"], cwd=target)  # noqa: S603, S607
+        subprocess.check_call(["npm", "run", "build"], cwd=target, env=os.environ)  # noqa: S603, S607
 
     if run:
         # Maximum request limit. Terminating afterward. Suitable for software testing.