diff --git a/packages/core/core/src/PackagerRunner.js b/packages/core/core/src/PackagerRunner.js
index 35ad6f35c75b..61715a7b2130 100644
--- a/packages/core/core/src/PackagerRunner.js
+++ b/packages/core/core/src/PackagerRunner.js
@@ -460,7 +460,14 @@ export default class PackagerRunner {
     };
 
     let mapKey = cacheKeys.map;
-    if (await this.options.cache.blobExists(mapKey)) {
+    if (
+      (bundle.target.sourceMap
+        ? typeof bundle.target.sourceMap === 'object'
+          ? !bundle.target.sourceMap.inline
+          : bundle.target.sourceMap
+        : true) &&
+      (await this.options.cache.blobExists(mapKey))
+    ) {
       let mapStream = this.options.cache.getStream(mapKey);
       await writeFileStream(
         outputFS,
diff --git a/packages/packagers/js/src/JSPackager.js b/packages/packagers/js/src/JSPackager.js
index 1b14b014e47e..fa0744535737 100644
--- a/packages/packagers/js/src/JSPackager.js
+++ b/packages/packagers/js/src/JSPackager.js
@@ -84,7 +84,7 @@ export default new Packager({
         queue.add(async () => {
           let [code, mapBuffer] = await Promise.all([
             node.value.getCode(),
-            node.value.getMapBuffer(),
+            bundle.target.sourceMap && node.value.getMapBuffer(),
           ]);
           return {code, mapBuffer};
         });