diff --git a/.gitignore b/.gitignore
index 7a9d2aa37c..088a673331 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 /node_modules
 /.tern-port
+/acorn_csp.js
diff --git a/package.json b/package.json
index e8d244ea07..63412ab22d 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
                   "url": "http://marijnhaverbeke.nl/acorn/LICENSE"}],
     "scripts": {
       "test": "node test/run.js",
-      "prepublish": "bin/without_eval > acorn_csp.js"
+      "prepublish": "node bin/without_eval > acorn_csp.js"
     },
     "bin": {"acorn": "./bin/acorn"},
     "devDependencies": {"regenerate": "~0.6.2",