diff --git a/src/main/java/com/google/devtools/build/lib/bazel/bzlmod/LockFileModuleExtension.java b/src/main/java/com/google/devtools/build/lib/bazel/bzlmod/LockFileModuleExtension.java
index 36cad282465055..1b5eb71d60c35b 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/bzlmod/LockFileModuleExtension.java
+++ b/src/main/java/com/google/devtools/build/lib/bazel/bzlmod/LockFileModuleExtension.java
@@ -29,6 +29,13 @@
 @GenerateTypeAdapter
 public abstract class LockFileModuleExtension implements Postable {
 
+  public static Builder builder() {
+    return new AutoValue_LockFileModuleExtension.Builder()
+        // TODO(salmasamy) can be removed when updating lockfile version
+        .setEnvVariables(ImmutableMap.of())
+        .setAccumulatedFileDigests(ImmutableMap.of());
+  }
+
   @SuppressWarnings("mutable")
   public abstract byte[] getBzlTransitiveDigest();
 
@@ -38,12 +45,20 @@ public abstract class LockFileModuleExtension implements Postable {
 
   public abstract ImmutableMap<String, RepoSpec> getGeneratedRepoSpecs();
 
-  public static LockFileModuleExtension create(
-      byte[] transitiveDigest,
-      ImmutableMap<Label, String> accumulatedFileDigests,
-      ImmutableMap<String, String> envVariables,
-      ImmutableMap<String, RepoSpec> generatedRepoSpecs) {
-    return new AutoValue_LockFileModuleExtension(
-        transitiveDigest, accumulatedFileDigests, envVariables, generatedRepoSpecs);
+  public abstract Builder toBuilder();
+
+  /** Builder type for {@link LockFileModuleExtension}. */
+  @AutoValue.Builder
+  public abstract static class Builder {
+
+    public abstract Builder setBzlTransitiveDigest(byte[] digest);
+
+    public abstract Builder setAccumulatedFileDigests(ImmutableMap<Label, String> value);
+
+    public abstract Builder setEnvVariables(ImmutableMap<String, String> value);
+
+    public abstract Builder setGeneratedRepoSpecs(ImmutableMap<String, RepoSpec> value);
+
+    public abstract LockFileModuleExtension build();
   }
 }
diff --git a/src/main/java/com/google/devtools/build/lib/bazel/bzlmod/SingleExtensionEvalFunction.java b/src/main/java/com/google/devtools/build/lib/bazel/bzlmod/SingleExtensionEvalFunction.java
index 6714d12c4f2544..7f56efc2340aa4 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/bzlmod/SingleExtensionEvalFunction.java
+++ b/src/main/java/com/google/devtools/build/lib/bazel/bzlmod/SingleExtensionEvalFunction.java
@@ -198,11 +198,12 @@ public SkyValue compute(SkyKey skyKey, Environment env)
           .post(
               ModuleExtensionResolutionEvent.create(
                   extensionId,
-                  LockFileModuleExtension.create(
-                      bzlTransitiveDigest,
-                      moduleExtensionResult.getAccumulatedFileDigests(),
-                      extensionEnvVars,
-                      generatedRepoSpecs)));
+                  LockFileModuleExtension.builder()
+                      .setBzlTransitiveDigest(bzlTransitiveDigest)
+                      .setAccumulatedFileDigests(moduleExtensionResult.getAccumulatedFileDigests())
+                      .setEnvVariables(extensionEnvVars)
+                      .setGeneratedRepoSpecs(generatedRepoSpecs)
+                      .build()));
     }
     return createSingleExtentionValue(generatedRepoSpecs, usagesValue);
   }