5 files changed, 14 insertions, 12 deletions

diff --git a/src/nix/add-to-store.cc b/src/nix/add-to-store.cc
index f9d6de16e..ad1f9e91f 100644
--- a/src/nix/add-to-store.cc
+++ b/src/nix/add-to-store.cc
@@ -50,7 +50,7 @@ struct CmdAddToStore : MixDryRun, StoreCommand
         info.narSize = sink.s->size();
         info.ca = std::optional { FixedOutputHash {
             .method = FileIngestionMethod::Recursive,
-            .hash = info.narHash,
+            .hash = *info.narHash,
         } };
 
         if (!dryRun) {
diff --git a/src/nix/installables.cc b/src/nix/installables.cc
index 41c077c47..273c0fc39 100644
--- a/src/nix/installables.cc
+++ b/src/nix/installables.cc
@@ -276,7 +276,7 @@ std::vector<std::pair<std::shared_ptr<eval_cache::AttrCursor>, std::string>>
 Installable::getCursors(EvalState & state, bool useEvalCache)
 {
     auto evalCache =
-        std::make_shared<nix::eval_cache::EvalCache>(false, Hash(), state,
+        std::make_shared<nix::eval_cache::EvalCache>(std::nullopt, state,
             [&]() { return toValue(state).first; });
     return {{evalCache->getRoot(), ""}};
 }
@@ -437,9 +437,11 @@ ref<eval_cache::EvalCache> openEvalCache(
     std::shared_ptr<flake::LockedFlake> lockedFlake,
     bool useEvalCache)
 {
-    return ref(std::make_shared<nix::eval_cache::EvalCache>(
-        useEvalCache && evalSettings.pureEval,
-        lockedFlake->getFingerprint(),
+	auto fingerprint = lockedFlake->getFingerprint();
+    return make_ref<nix::eval_cache::EvalCache>(
+        useEvalCache && evalSettings.pureEval
+            ? std::optional { std::cref(fingerprint) }
+            : std::nullopt,
         state,
         [&state, lockedFlake]()
         {
@@ -457,7 +459,7 @@ ref<eval_cache::EvalCache> openEvalCache(
             assert(aOutputs);
 
             return aOutputs->value;
-        }));
+        });
 }
 
 static std::string showAttrPaths(const std::vector<std::string> & paths)
diff --git a/src/nix/make-content-addressable.cc b/src/nix/make-content-addressable.cc
index 712043978..2fe2e2fb2 100644
--- a/src/nix/make-content-addressable.cc
+++ b/src/nix/make-content-addressable.cc
@@ -84,7 +84,7 @@ struct CmdMakeContentAddressable : StorePathsCommand, MixJSON
             info.narSize = sink.s->size();
             info.ca = FixedOutputHash {
                 .method = FileIngestionMethod::Recursive,
-                .hash = info.narHash,
+                .hash = *info.narHash,
             };
 
             if (!json)
diff --git a/src/nix/profile.cc b/src/nix/profile.cc
index c6cd88c49..7dcc0b6d4 100644
--- a/src/nix/profile.cc
+++ b/src/nix/profile.cc
@@ -133,7 +133,7 @@ struct ProfileManifest
         info.references = std::move(references);
         info.narHash = narHash;
         info.narSize = sink.s->size();
-        info.ca = FixedOutputHash { .method = FileIngestionMethod::Recursive, .hash = info.narHash };
+        info.ca = FixedOutputHash { .method = FileIngestionMethod::Recursive, .hash = *info.narHash };
 
         auto source = StringSource { *sink.s };
         store->addToStore(info, source);
diff --git a/src/nix/verify.cc b/src/nix/verify.cc
index ce90b0f6d..fc7a9765c 100644
--- a/src/nix/verify.cc
+++ b/src/nix/verify.cc
@@ -91,15 +91,15 @@ struct CmdVerify : StorePathsCommand
 
                     std::unique_ptr<AbstractHashSink> hashSink;
                     if (!info->ca)
-                        hashSink = std::make_unique<HashSink>(*info->narHash.type);
+                        hashSink = std::make_unique<HashSink>(info->narHash->type);
                     else
-                        hashSink = std::make_unique<HashModuloSink>(*info->narHash.type, std::string(info->path.hashPart()));
+                        hashSink = std::make_unique<HashModuloSink>(info->narHash->type, std::string(info->path.hashPart()));
 
                     store->narFromPath(info->path, *hashSink);
 
                     auto hash = hashSink->finish();
 
-                    if (hash.first != info->narHash) {
+                    if (hash.first != *info->narHash) {
                         corrupted++;
                         act2.result(resCorruptedPath, store->printStorePath(info->path));
                         logError({
@@ -107,7 +107,7 @@ struct CmdVerify : StorePathsCommand
                             .hint = hintfmt(
                                 "path '%s' was modified! expected hash '%s', got '%s'",
                                 store->printStorePath(info->path),
-                                info->narHash.to_string(Base32, true),
+                                info->narHash->to_string(Base32, true),
                                 hash.first.to_string(Base32, true))
                         });
                     }