cssnano already applies postcss-calc, so remove redundant call

diff --git a/gulp.d/tasks/build.js b/gulp.d/tasks/build.js
index 710dbc7..ad5d034 100644 (file)
--- a/gulp.d/tasks/build.js
+++ b/gulp.d/tasks/build.js
@@ -38,7 +38,7 @@ module.exports = (src, dest, preview) => () => {
       },
     ]),
     postcssVar({ preserve: preview ? 'preserve-computed' : false }),
-    postcssCalc,
+    preview ? postcssCalc : () => {},
     autoprefixer,
     preview ? () => {} : cssnano({ preset: 'default' }),
   ]