2 files changed, 3 insertions, 2 deletions
diff --git a/src/libexpr/flake/lockfile.cc b/src/libexpr/flake/lockfile.cc
index 6a64f113e..3d796eadc 100644
--- a/src/libexpr/flake/lockfile.cc
+++ b/src/libexpr/flake/lockfile.cc
@@ -111,8 +111,7 @@ nlohmann::json LockedInput::toJson() const
 
 StorePath LockedInput::computeStorePath(Store & store) const
 {
-    assert(info.narHash);
-    return store.makeFixedOutputPath(true, info.narHash, "source");
+    return info.computeStorePath(store);
 }
 
 LockedInputs::LockedInputs(const nlohmann::json & json)
diff --git a/src/libexpr/flake/lockfile.hh b/src/libexpr/flake/lockfile.hh
index 6333a6875..6203c40cb 100644
--- a/src/libexpr/flake/lockfile.hh
+++ b/src/libexpr/flake/lockfile.hh
@@ -11,6 +11,8 @@ struct StorePath;
 
 namespace nix::flake {
 
+using namespace fetchers;
+
 typedef std::vector<FlakeId> InputPath;
 
 struct LockedInput;