diff --git a/tool/get-embedded-compiler.ts b/tool/get-embedded-compiler.ts
index cb8b7245..d836e487 100644
--- a/tool/get-embedded-compiler.ts
+++ b/tool/get-embedded-compiler.ts
@@ -2,6 +2,7 @@
 // MIT-style license that can be found in the LICENSE file or at
 // https://opensource.org/licenses/MIT.
 
+import {promises as fs, readdirSync} from 'fs';
 import * as p from 'path';
 import * as shell from 'shelljs';
 
@@ -15,6 +16,7 @@ import * as utils from './utils';
  */
 export async function getEmbeddedCompiler(
   outPath: string,
+  js?: boolean,
   options?: {ref: string} | {path: string}
 ): Promise<void> {
   const repo = 'dart-sass';
@@ -41,21 +43,52 @@ export async function getEmbeddedCompiler(
     await utils.link(languageInHost, languageInCompiler);
   }
 
-  buildDartSassEmbedded(source);
-  await utils.link(p.join(source, 'build'), p.join(outPath, repo));
+  buildDartSassEmbedded(source, js ?? false);
+  if (js) {
+    // Remove any dart sass binary packages
+    const modules = ['node_modules', p.join(source, 'node_modules')].flatMap(
+      node_modules =>
+        readdirSync(node_modules)
+          .filter(dir => dir.startsWith('sass-embedded-'))
+          .map(dir => p.join(node_modules, dir))
+    );
+    if (modules.length > 0) {
+      console.log(`Removing ${modules.join(', ')}.`);
+      await Promise.all(
+        modules.map(module => fs.rm(module, {force: true, recursive: true}))
+      );
+    }
+
+    await utils.link(p.join(source, 'build/npm'), 'node_modules/sass');
+  } else {
+    await utils.link(p.join(source, 'build'), p.join(outPath, repo));
+  }
 }
 
 // Builds the Embedded Dart Sass executable from the source at `repoPath`.
-function buildDartSassEmbedded(repoPath: string): void {
+function buildDartSassEmbedded(repoPath: string, js: boolean): void {
   console.log("Downloading Dart Sass's dependencies.");
   shell.exec('dart pub upgrade', {
     cwd: repoPath,
     silent: true,
   });
 
-  console.log('Building the Dart Sass executable.');
-  shell.exec('dart run grinder protobuf pkg-standalone-dev', {
-    cwd: repoPath,
-    env: {...process.env, UPDATE_SASS_PROTOCOL: 'false'},
-  });
+  if (js) {
+    shell.exec('npm install', {
+      cwd: repoPath,
+      silent: true,
+    });
+
+    console.log('Building the Dart Sass npm package.');
+    shell.exec('dart run grinder protobuf pkg-npm-dev', {
+      cwd: repoPath,
+      env: {...process.env, UPDATE_SASS_PROTOCOL: 'false'},
+    });
+  } else {
+    console.log('Building the Dart Sass executable.');
+    shell.exec('dart run grinder protobuf pkg-standalone-dev', {
+      cwd: repoPath,
+      env: {...process.env, UPDATE_SASS_PROTOCOL: 'false'},
+    });
+  }
 }
diff --git a/tool/init.ts b/tool/init.ts
index 230cd09d..c14e15d1 100644
--- a/tool/init.ts
+++ b/tool/init.ts
@@ -18,6 +18,10 @@ const argv = yargs(process.argv.slice(2))
     type: 'string',
     description: 'Build the Embedded Dart Sass binary from this Git ref.',
   })
+  .option('compiler-js', {
+    type: 'boolean',
+    description: 'Build the Embedded Dart Sass with dart2js.',
+  })
   .option('skip-compiler', {
     type: 'boolean',
     description: "Don't Embedded Dart Sass at all.",
@@ -55,15 +59,15 @@ void (async () => {
 
     if (!argv['skip-compiler']) {
       if (argv['compiler-ref']) {
-        await getEmbeddedCompiler(outPath, {
+        await getEmbeddedCompiler(outPath, argv['compiler-js'], {
           ref: argv['compiler-ref'],
         });
       } else if (argv['compiler-path']) {
-        await getEmbeddedCompiler(outPath, {
+        await getEmbeddedCompiler(outPath, argv['compiler-js'], {
           path: argv['compiler-path'],
         });
       } else {
-        await getEmbeddedCompiler(outPath);
+        await getEmbeddedCompiler(outPath, argv['compiler-js']);
       }
     }