Updated next config to not need node-sass in production

next.config.js

@@ -1,22 +1,26 @@
-const withSass = require('@zeit/next-sass')
-const { ANALYZE } = process.env
-let AnalyzerPlugin
+const { ANALYZE, BUILD, NODE_ENV } = process.env
+let conf = {
+  poweredByHeader: false,
+}
+
 if (ANALYZE) {
   const { BundleAnalyzerPlugin } = require('webpack-bundle-analyzer')
-  AnalyzerPlugin = BundleAnalyzerPlugin
-}
-module.exports = withSass({
-  poweredByHeader: false,
-  webpack: function(config, { isServer }) {
-    if (ANALYZE) {
-      config.plugins.push(
-        new AnalyzerPlugin({
-          analyzerMode: 'server',
-          analyzerPort: isServer ? 8888 : 8889,
-          openAnalyzer: true,
-        })
-      )
-    }
+  conf.webpack = function(config, { isServer }) {
+    config.plugins.push(
+      new BundleAnalyzerPlugin({
+        analyzerMode: 'server',
+        analyzerPort: isServer ? 8888 : 8889,
+        openAnalyzer: true,
+      })
+    )
     return config
-  },
-})
+  }
+}
+
+// Only add sass module when building or during dev
+if (BUILD || NODE_ENV !== 'production') {
+  const withSass = require('@zeit/next-sass')
+  conf = withSass(conf)
+}
+
+module.exports = conf