diff --git a/package.json b/package.json
index a78bc250d4..38e5ea3331 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "A mostly reasonable approach to JavaScript.",
   "scripts": {
     "preinstall": "npm run install:config && npm run install:config:base",
-    "postinstall": "rm -rf node_modules/markdownlint-cli/node_modules/markdownlint",
+    "postinstall": "rmdir node_modules/markdownlint-cli/node_modules/markdownlint",
     "install:config": "cd packages/eslint-config-airbnb && npm prune && npm install",
     "install:config:base": "cd packages/eslint-config-airbnb-base && npm prune && npm install",
     "lint": "markdownlint --config linters/.markdownlint.json README.md */README.md",