diff --git a/package.json b/package.json
index 95fb212..d22200d 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@nulo/isogit-lfs",
-  "version": "0.2.8",
+  "version": "0.2.9",
   "description": "LFS helpers for Isomorphic Git",
   "main": "dist/index.js",
   "repository": "git@github.com:riboseinc/isogit-lfs.git",
diff --git a/src/download.ts b/src/download.ts
index 4522a01..d6adbb5 100644
--- a/src/download.ts
+++ b/src/download.ts
@@ -28,19 +28,21 @@ function isValidLFSInfoResponseData(
  * Uses already cached object, if size matches.
  */
 export default async function downloadBlobFromPointer(
-  { promises: fs }: PromiseFsClient,
+  fs: PromiseFsClient | null,
   { http: { request }, headers = {}, url, auth }: HTTPRequest,
   { info, objectPath }: Pointer
 ): Promise<Buffer> {
-  try {
-    const cached = await fs.readFile(objectPath);
-    if (cached.byteLength === info.size) {
-      return cached;
-    }
-  } catch (e) {
-    // Silence file not found errors (implies cache miss)
-    if ((e as any).code !== "ENOENT") {
-      throw e;
+  if (fs) {
+    try {
+      const cached = await fs?.promises.readFile(objectPath);
+      if (cached.byteLength === info.size) {
+        return cached;
+      }
+    } catch (e) {
+      // Silence file not found errors (implies cache miss)
+      if ((e as any).code !== "ENOENT") {
+        throw e;
+      }
     }
   }
 
@@ -99,10 +101,12 @@ export default async function downloadBlobFromPointer(
 
     const blob = await bodyToBuffer(lfsObjectBody);
 
-    // Write LFS cache for this object, if cache path is accessible.
-    if (await isWriteable({ promises: fs }, objectPath)) {
-      await fs.mkdir(path.dirname(objectPath), { recursive: true });
-      await fs.writeFile(objectPath, blob);
+    if (fs) {
+      // Write LFS cache for this object, if cache path is accessible.
+      if (await isWriteable(fs, objectPath)) {
+        await fs.promises.mkdir(path.dirname(objectPath), { recursive: true });
+        await fs.promises.writeFile(objectPath, blob);
+      }
     }
 
     return blob;