diff --git a/dist/lips.cjs b/dist/lips.cjs
index fb4b1001..ae787f1a 100644
--- a/dist/lips.cjs
+++ b/dist/lips.cjs
@@ -31,7 +31,7 @@
  * Copyright (c) 2014-present, Facebook, Inc.
  * released under MIT license
  *
- * build: Fri, 06 Dec 2024 13:48:17 +0000
+ * build: Fri, 06 Dec 2024 13:56:22 +0000
  */
 
 'use strict';
@@ -4966,8 +4966,8 @@ var Parser = /*#__PURE__*/function () {
       }, cleanup);
     }
   }, {
-    key: "parse",
-    value: function parse(arg) {
+    key: "prepare",
+    value: function prepare(arg) {
       if (arg instanceof LString) {
         arg = arg.toString();
       }
@@ -5643,7 +5643,7 @@ function _parse2() {
             parser = new Parser({
               env: env
             });
-            parser.parse(arg);
+            parser.prepare(arg);
           }
         case 2:
           _context9.next = 5;
@@ -12356,7 +12356,7 @@ function InputPort(read) {
           parser = new Parser({
             env: env
           });
-          parser.parse(line);
+          parser.prepare(line);
         case 6:
           return _context14.abrupt("return", _this10.__parser__);
         case 7:
@@ -17393,10 +17393,10 @@ if (typeof window !== 'undefined') {
 // -------------------------------------------------------------------------
 var banner = function () {
   // Rollup tree-shaking is removing the variable if it's normal string because
-  // obviously 'Fri, 06 Dec 2024 13:48:17 +0000' == '{{' + 'DATE}}'; can be removed
+  // obviously 'Fri, 06 Dec 2024 13:56:22 +0000' == '{{' + 'DATE}}'; can be removed
   // but disabling Tree-shaking is adding lot of not used code so we use this
   // hack instead
-  var date = LString('Fri, 06 Dec 2024 13:48:17 +0000').valueOf();
+  var date = LString('Fri, 06 Dec 2024 13:56:22 +0000').valueOf();
   var _date = date === '{{' + 'DATE}}' ? new Date() : new Date(date);
   var _format = function _format(x) {
     return x.toString().padStart(2, '0');
@@ -17436,7 +17436,7 @@ read_only(QuotedPromise, '__class__', 'promise');
 read_only(Parameter, '__class__', 'parameter');
 // -------------------------------------------------------------------------
 var version = 'DEV';
-var date = 'Fri, 06 Dec 2024 13:48:17 +0000';
+var date = 'Fri, 06 Dec 2024 13:56:22 +0000';
 
 // unwrap async generator into Promise<Array>
 var parse = compose(uniterate_async, _parse);
diff --git a/dist/lips.esm.js b/dist/lips.esm.js
index c3b7cda5..c9275d53 100644
--- a/dist/lips.esm.js
+++ b/dist/lips.esm.js
@@ -31,7 +31,7 @@
  * Copyright (c) 2014-present, Facebook, Inc.
  * released under MIT license
  *
- * build: Fri, 06 Dec 2024 13:48:17 +0000
+ * build: Fri, 06 Dec 2024 13:56:22 +0000
  */
 
 function _classApplyDescriptorGet(receiver, descriptor) {
@@ -4963,8 +4963,8 @@ var Parser = /*#__PURE__*/function () {
       }, cleanup);
     }
   }, {
-    key: "parse",
-    value: function parse(arg) {
+    key: "prepare",
+    value: function prepare(arg) {
       if (arg instanceof LString) {
         arg = arg.toString();
       }
@@ -5640,7 +5640,7 @@ function _parse2() {
             parser = new Parser({
               env: env
             });
-            parser.parse(arg);
+            parser.prepare(arg);
           }
         case 2:
           _context9.next = 5;
@@ -12353,7 +12353,7 @@ function InputPort(read) {
           parser = new Parser({
             env: env
           });
-          parser.parse(line);
+          parser.prepare(line);
         case 6:
           return _context14.abrupt("return", _this10.__parser__);
         case 7:
@@ -17390,10 +17390,10 @@ if (typeof window !== 'undefined') {
 // -------------------------------------------------------------------------
 var banner = function () {
   // Rollup tree-shaking is removing the variable if it's normal string because
-  // obviously 'Fri, 06 Dec 2024 13:48:17 +0000' == '{{' + 'DATE}}'; can be removed
+  // obviously 'Fri, 06 Dec 2024 13:56:22 +0000' == '{{' + 'DATE}}'; can be removed
   // but disabling Tree-shaking is adding lot of not used code so we use this
   // hack instead
-  var date = LString('Fri, 06 Dec 2024 13:48:17 +0000').valueOf();
+  var date = LString('Fri, 06 Dec 2024 13:56:22 +0000').valueOf();
   var _date = date === '{{' + 'DATE}}' ? new Date() : new Date(date);
   var _format = function _format(x) {
     return x.toString().padStart(2, '0');
@@ -17433,7 +17433,7 @@ read_only(QuotedPromise, '__class__', 'promise');
 read_only(Parameter, '__class__', 'parameter');
 // -------------------------------------------------------------------------
 var version = 'DEV';
-var date = 'Fri, 06 Dec 2024 13:48:17 +0000';
+var date = 'Fri, 06 Dec 2024 13:56:22 +0000';
 
 // unwrap async generator into Promise<Array>
 var parse = compose(uniterate_async, _parse);
diff --git a/dist/lips.js b/dist/lips.js
index 175dff7a..b3d33f96 100644
--- a/dist/lips.js
+++ b/dist/lips.js
@@ -31,7 +31,7 @@
  * Copyright (c) 2014-present, Facebook, Inc.
  * released under MIT license
  *
- * build: Fri, 06 Dec 2024 13:48:17 +0000
+ * build: Fri, 06 Dec 2024 13:56:22 +0000
  */
 
 (function (global, factory) {
@@ -4970,8 +4970,8 @@
         }, cleanup);
       }
     }, {
-      key: "parse",
-      value: function parse(arg) {
+      key: "prepare",
+      value: function prepare(arg) {
         if (arg instanceof LString) {
           arg = arg.toString();
         }
@@ -5647,7 +5647,7 @@
               parser = new Parser({
                 env: env
               });
-              parser.parse(arg);
+              parser.prepare(arg);
             }
           case 2:
             _context9.next = 5;
@@ -12360,7 +12360,7 @@
             parser = new Parser({
               env: env
             });
-            parser.parse(line);
+            parser.prepare(line);
           case 6:
             return _context14.abrupt("return", _this10.__parser__);
           case 7:
@@ -17397,10 +17397,10 @@
   // -------------------------------------------------------------------------
   var banner = function () {
     // Rollup tree-shaking is removing the variable if it's normal string because
-    // obviously 'Fri, 06 Dec 2024 13:48:17 +0000' == '{{' + 'DATE}}'; can be removed
+    // obviously 'Fri, 06 Dec 2024 13:56:22 +0000' == '{{' + 'DATE}}'; can be removed
     // but disabling Tree-shaking is adding lot of not used code so we use this
     // hack instead
-    var date = LString('Fri, 06 Dec 2024 13:48:17 +0000').valueOf();
+    var date = LString('Fri, 06 Dec 2024 13:56:22 +0000').valueOf();
     var _date = date === '{{' + 'DATE}}' ? new Date() : new Date(date);
     var _format = function _format(x) {
       return x.toString().padStart(2, '0');
@@ -17440,7 +17440,7 @@
   read_only(Parameter, '__class__', 'parameter');
   // -------------------------------------------------------------------------
   var version = 'DEV';
-  var date = 'Fri, 06 Dec 2024 13:48:17 +0000';
+  var date = 'Fri, 06 Dec 2024 13:56:22 +0000';
 
   // unwrap async generator into Promise<Array>
   var parse = compose(uniterate_async, _parse);
diff --git a/src/lips.js b/src/lips.js
index ce1302e0..1906c9f3 100644
--- a/src/lips.js
+++ b/src/lips.js
@@ -1521,7 +1521,7 @@ class Parser {
             return result;
         }, cleanup);
     }
-    parse(arg) {
+    prepare(arg) {
         if (arg instanceof LString) {
             arg = arg.toString();
         }
@@ -1867,7 +1867,7 @@ async function* _parse(arg, env) {
         parser = arg;
     } else {
         parser = new Parser({ env });
-        parser.parse(arg);
+        parser.prepare(arg);
     }
     let prev;
     while (true) {
@@ -7037,7 +7037,7 @@ function InputPort(read, env = global_env) {
         if (!this.char_ready()) {
             const line = await this._read();
             parser = new Parser({ env });
-            parser.parse(line);
+            parser.prepare(line);
         }
         return this.__parser__;
     });
@@ -7983,7 +7983,7 @@ const constants = {
     ...parsable_contants
 };
 // -------------------------------------------------------------------------
-const global_env = new Environment({
+var global_env = new Environment({
     eof,
     undefined, // undefined as parser constant breaks most of the unit tests
     // ---------------------------------------------------------------------