diff --git a/lib/builder/builder.js b/lib/builder/builder.js
index b5a51aee9b..91f3a66746 100644
--- a/lib/builder/builder.js
+++ b/lib/builder/builder.js
@@ -137,7 +137,7 @@ export default class Builder {
       if (isPureObject(this.options.build.postcss.plugins)) {
         this.options.build.postcss.plugins = Object.keys(this.options.build.postcss.plugins)
           .map(p => {
-            const plugin = require(p)
+            const plugin = require(this.nuxt.resolvePath(p))
             const opts = this.options.build.postcss.plugins[p]
             if (opts === false) return // Disabled
             const instance = plugin(opts)