diff --git a/eden/fs/config/EdenConfig.h b/eden/fs/config/EdenConfig.h
index 374f7b7fe6..d47534d24b 100644
--- a/eden/fs/config/EdenConfig.h
+++ b/eden/fs/config/EdenConfig.h
@@ -176,6 +176,13 @@ class EdenConfig : public ConfigSettingManager {
     return fuseDaemonTimeout_.getValue();
   }
 
+  /**
+   * Controls if Eden reads from Mercurial's datapack store.
+   */
+  bool getUseDatapack() const {
+    return useDatapack_.getValue();
+  }
+
   void setUserConfigPath(AbsolutePath userConfigPath);
 
   void setSystemConfigDir(AbsolutePath systemConfigDir);
@@ -317,6 +324,8 @@ class EdenConfig : public ConfigSettingManager {
       "fuse:daemon-timeout",
       std::chrono::nanoseconds::max(),
       this};
+
+  ConfigSetting<bool> useDatapack_{"hg:use-datapack", false, this};
 };
 } // namespace eden
 } // namespace facebook
diff --git a/eden/fs/store/hg/HgBackingStore.cpp b/eden/fs/store/hg/HgBackingStore.cpp
index 81ddb43278..3a4e5d5f36 100644
--- a/eden/fs/store/hg/HgBackingStore.cpp
+++ b/eden/fs/store/hg/HgBackingStore.cpp
@@ -664,19 +664,23 @@ folly::Future<Hash> HgBackingStore::importTreeManifest(const Hash& commitId) {
 }
 
 Future<unique_ptr<Blob>> HgBackingStore::getBlob(const Hash& id) {
+  auto edenConfig = config_->getEdenConfig();
+
   // Look up the mercurial path and file revision hash,
   // which we need to import the data from mercurial
   HgProxyHash hgInfo(localStore_, id, "importFileContents");
 
 #if EDEN_HAVE_RUST_DATAPACK
-  if (useDatapackGetBlob_ && datapackStore_) {
+  if (edenConfig->getUseDatapack() && datapackStore_) {
     if (auto content = datapackStore_->getBlob(id, hgInfo)) {
+      XLOG(DBG5) << "importing file contents of '" << hgInfo.path() << "', "
+                 << hgInfo.revHash().toString() << " from datapack store";
       return makeFuture(std::move(content));
     }
   } else
 #endif
       // Prefer using the above rust implementation over the C++ implementation
-      if (useDatapackGetBlob_ && unionStore_) {
+      if (edenConfig->getUseDatapack() && unionStore_) {
     auto content = getBlobFromUnionStore(*unionStore_->wlock(), id, hgInfo);
     if (content) {
       return makeFuture(std::move(content));
diff --git a/eden/fs/store/hg/HgBackingStore.h b/eden/fs/store/hg/HgBackingStore.h
index c36be3228b..edd15f7e62 100644
--- a/eden/fs/store/hg/HgBackingStore.h
+++ b/eden/fs/store/hg/HgBackingStore.h
@@ -198,7 +198,6 @@ class HgBackingStore : public BackingStore {
   // UnionDatapackStore is alive.
   std::vector<std::unique_ptr<DatapackStore>> dataPackStores_;
   std::unique_ptr<folly::Synchronized<UnionDatapackStore>> unionStore_;
-  bool useDatapackGetBlob_{false};
 
   std::string repoName_;
   folly::Synchronized<std::shared_ptr<BackingStore>> mononoke_;