diff --git a/lib/generate/css.ts b/lib/generate/css.ts
index e1c2501..ca2f420 100644
--- a/lib/generate/css.ts
+++ b/lib/generate/css.ts
@@ -3,11 +3,11 @@ import * as util from "../util";
 import sass, { Result as SassResult } from "node-sass";
 import ejs from "ejs";
 
-function renderSass(data: string, minify = false): Promise<SassResult> {
+function renderSass(data: string): Promise<SassResult> {
 	return new Promise((resolve, reject) => {
 		sass.render({
 			data: data,
-			outputStyle: minify ? "compressed" : "expanded"
+			outputStyle: process.env.MINIFY_CSS ? "compressed" : "expanded"
 		}, (error, result) => {
 			if (error) reject(error);
 			else resolve(result);