diff --git a/lib/generate/css.ts b/lib/generate/css.ts
index b6bd61d..9cd33af 100644
--- a/lib/generate/css.ts
+++ b/lib/generate/css.ts
@@ -7,7 +7,7 @@ function renderSass(data: string): Promise<SassResult> {
 	return new Promise((resolve, reject) => {
 		sass.render({
 			data: data,
-			outputStyle: process.env.MINIFY_CSS ? "compressed" : "expanded"
+			outputStyle: process.env.NODE_ENV === "development" ? "expanded" : "compressed"
 		}, (error, result) => {
 			if (error) reject(error);
 			else resolve(result);