diff --git a/build_web_compilers/CHANGELOG.md b/build_web_compilers/CHANGELOG.md
index 380ecdde4..32f02dd8b 100644
--- a/build_web_compilers/CHANGELOG.md
+++ b/build_web_compilers/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 4.3.2
+- Fix Dart2JS adding extraneous sourcemaps to its archive when both wasm and js are enabled.
+
 ## 4.3.1
 - Fix Dart2JS sourcemaps not being written when both wasm and js are enabled.
 
diff --git a/build_web_compilers/lib/src/dart2js_bootstrap.dart b/build_web_compilers/lib/src/dart2js_bootstrap.dart
index 430278801..f3c431578 100644
--- a/build_web_compilers/lib/src/dart2js_bootstrap.dart
+++ b/build_web_compilers/lib/src/dart2js_bootstrap.dart
@@ -131,7 +131,11 @@ $librariesString
     final archive = Archive();
     await for (final jsFile in fileGlob.list(root: rootDir)) {
       if (jsFile.path.endsWith(entrypointExtension) ||
-          jsFile.path.endsWith(jsEntrypointSourceMapExtension)) {
+          jsFile.path.endsWith(
+            onlyCompiler
+                ? jsEntrypointSourceMapExtension
+                : dart2jsEntrypointSourceMapExtension,
+          )) {
         // These are explicitly output, and are not part of the archive.
         continue;
       }
diff --git a/build_web_compilers/pubspec.yaml b/build_web_compilers/pubspec.yaml
index 0802b454c..0f37d62fa 100644
--- a/build_web_compilers/pubspec.yaml
+++ b/build_web_compilers/pubspec.yaml
@@ -1,5 +1,5 @@
 name: build_web_compilers
-version: 4.3.1
+version: 4.3.2
 description: Builder implementations wrapping the dart2js and DDC compilers.
 repository: https://github.com/dart-lang/build/tree/master/build_web_compilers
 resolution: workspace