diff --git a/src/libexpr/flake/lockfile.cc b/src/libexpr/flake/lockfile.cc
index a3ed90e1f..a74e68c9c 100644
--- a/src/libexpr/flake/lockfile.cc
+++ b/src/libexpr/flake/lockfile.cc
@@ -219,7 +219,7 @@ std::optional<FlakeRef> LockFile::isUnlocked() const
     visit(root);
 
     for (auto & i : nodes) {
-        if (i == root) continue;
+        if (i == ref<const Node>(root)) continue;
         auto node = i.dynamic_pointer_cast<const LockedNode>();
         if (node && !node->lockedRef.input.isLocked())
             return node->lockedRef;
diff --git a/src/libstore/store-api.cc b/src/libstore/store-api.cc
index 31bd9318f..601efa1cc 100644
--- a/src/libstore/store-api.cc
+++ b/src/libstore/store-api.cc
@@ -744,7 +744,7 @@ StorePathSet Store::queryValidPaths(const StorePathSet & paths, SubstituteFlag m
 
     auto doQuery = [&](const StorePath & path) {
         checkInterrupt();
-        queryPathInfo(path, {[path, this, &state_, &wakeup](std::future<ref<const ValidPathInfo>> fut) {
+        queryPathInfo(path, {[path, &state_, &wakeup](std::future<ref<const ValidPathInfo>> fut) {
             auto state(state_.lock());
             try {
                 auto info = fut.get();