diff --git a/lib/findPlugins.js b/lib/findPlugins.js
index 7f96894..b1506d4 100644
--- a/lib/findPlugins.js
+++ b/lib/findPlugins.js
@@ -32,7 +32,7 @@ module.exports = (cwd, searchDir = 'node_modules') => {
 
   // Search relative to every directory in $NODE_PATH.
   const root = cp.execSync('npm root').toString().trim();
-  const globalRoot = cp.execSync('npm root').toString().trim();
+  const globalRoot = cp.execSync('npm root -g').toString().trim();
   const defaultRoots = `${root}:${globalRoot}`;
 
   (process.env.NODE_PATH || defaultRoots).split(':').forEach(cwd =>