diff --git a/webpack/helpers.js b/webpack/helpers.js
index 9a77ebbd0d..c4fcebe152 100644
--- a/webpack/helpers.js
+++ b/webpack/helpers.js
@@ -58,7 +58,7 @@ else {
   themePath = srcPath;
 }
 
-const relativeThemePath = path.relative(srcPath, themePath);
+const relativeThemePath = path.relative(projectRoot('./'), themePath);
 
 const globalCSSImports = (env) => { return [
   buildRoot('styles/_variables.scss', env),