diff --git a/src/handlers/js.js b/src/handlers/js.js
index 70dff10..8f2d29d 100644
--- a/src/handlers/js.js
+++ b/src/handlers/js.js
@@ -11,7 +11,7 @@ module.exports = function(env) {
 
     const createJscOpts = () => {
         return {
-            target: env.swc.es,
+            target: env.swc?.es ?? 'es2021',
             loose: false,
             externalHelpers: false,
             keepClassNames: true,
@@ -19,7 +19,7 @@ module.exports = function(env) {
             transform: {},
             parser: {
                 syntax: 'ecmascript',
-                jsx: env.swc.jsx !== false,
+                jsx: env.swc?.jsx !== false,
                 dynamicImport: false,
                 privateMethod: false,
                 functionBind: false,
@@ -33,7 +33,7 @@ module.exports = function(env) {
             transform: {
                 react: {
                     runtime: 'classic',
-                    pragma: env.swc.jsx || '',
+                    pragma: env.swc?.jsx ?? '$er',
                 },
             },
         };
diff --git a/src/handlers/twig.js b/src/handlers/twig.js
index 7fccbe3..e491417 100644
--- a/src/handlers/twig.js
+++ b/src/handlers/twig.js
@@ -22,8 +22,8 @@ module.exports = function(env) {
 
     return {
         process: async (task, vars) => {
-            let { stdout, stderr } = await exec(strtr(env.twig.cmdFormat, {
-                ':command': env.twig.cmdPathFull ?? pathJoin(env.root, env.twig.cmdPath),
+            let { stdout, stderr } = await exec(strtr(env.twig?.cmdFormat ?? ':command :path', {
+                ':command': env.twig?.cmdPathFull ?? pathJoin(env.root, env.twig?.cmdPath ?? 'tools/render-tpl'),
                 ':path': task.source,
             }));
 
diff --git a/src/index.js b/src/index.js
index 24a5bdb..2f0b737 100644
--- a/src/index.js
+++ b/src/index.js
@@ -5,24 +5,6 @@ const apTwig = require('./handlers/twig.js');
 const apWebManifest = require('./handlers/webmanifest.js');
 const { housekeep } = require('./housekeep.js');
 
-const DEFAULT_ENV = {
-    debug: false,
-    source: undefined,
-    public: undefined,
-    order: undefined,
-    vars: undefined,
-    housekeep: undefined,
-    swc: {
-        es: 'es2021',
-        jsx: '$er',
-    },
-    twig: {
-        cmdFormat: ':command :path',
-        cmdPathFull: undefined,
-        cmdPath: 'tools/render-tpl',
-    },
-};
-
 module.exports.process = async (env, tasks) => {
     if(typeof env.source !== 'string')
         throw 'env.source must be a path to the source directories';
@@ -32,8 +14,6 @@ module.exports.process = async (env, tasks) => {
     if(typeof tasks !== 'object' || tasks === null)
         throw 'tasks must be a non-null object';
 
-    env = { ...DEFAULT_ENV, ...env };
-
     const types = {
         js: new apJs(env),
         css: new apCss(env),