diff --git a/scripts/build-less b/scripts/build-less
index bdb73b3a8..cf86d271f 100755
--- a/scripts/build-less
+++ b/scripts/build-less
@@ -19,7 +19,7 @@ function compile(source, target) {
   if (os.type() === 'Windows_NT') {
     cmd = path.join(cwd, `${cmd}.cmd`)
   }
-  cp.execFileSync(cmd, [source, target])
+  cp.execFileSync(cmd, [source, target], { shell: true })
 }
 
 function toCSSPath(source) {