diff --git a/src/setup.py b/src/setup.py
index 4c4cc60ed..c0ead90eb 100644
--- a/src/setup.py
+++ b/src/setup.py
@@ -92,7 +92,7 @@ def npm_install():
         node_prefix = os.path.join(here, 'pretix', 'static.dist', 'node_prefix')
         os.makedirs(node_prefix, exist_ok=True)
         copy_tree(os.path.join(here, 'pretix', 'static', 'npm_dir'), node_prefix)
-        subprocess.check_call(['npm', 'install', '--prefix=' + node_prefix])
+        subprocess.check_call('npm install', shell=True, cwd=node_prefix)
         npm_installed = True