diff --git a/src/libfetchers/tarball.cc b/src/libfetchers/tarball.cc
index da8d20d98..f5356f0af 100644
--- a/src/libfetchers/tarball.cc
+++ b/src/libfetchers/tarball.cc
@@ -71,8 +71,8 @@ DownloadFileResult downloadFile(
         info.narHash = hashString(htSHA256, *sink.s);
         info.narSize = sink.s->size();
         info.ca = FixedOutputHash {
-            FileIngestionMethod::Flat,
-            hash,
+            .method = FileIngestionMethod::Flat,
+            .hash = hash,
         };
         auto source = StringSource { *sink.s };
         store->addToStore(info, source, NoRepair, NoCheckSigs);
diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 1126c186f..0c25897f8 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -3764,7 +3764,10 @@ void DerivationGoal::registerOutputs()
             else
                 assert(worker.store.parseStorePath(path) == dest);
 
-            ca = FixedOutputHash { i.second.hash->method, h2 };
+            ca = FixedOutputHash {
+                .method = i.second.hash->method,
+                .hash = h2,
+            };
         }
 
         /* Get rid of all weird permissions.  This also checks that
diff --git a/src/libstore/content-address.cc b/src/libstore/content-address.cc
index 98b3677bb..3d753836f 100644
--- a/src/libstore/content-address.cc
+++ b/src/libstore/content-address.cc
@@ -55,10 +55,16 @@ ContentAddress parseContentAddress(std::string_view rawCa) {
             auto methodAndHash = rawCa.substr(prefixSeparator+1, string::npos);
             if (methodAndHash.substr(0,2) == "r:") {
                 std::string_view hashRaw = methodAndHash.substr(2,string::npos);
-                return FixedOutputHash { FileIngestionMethod::Recursive, Hash(string(hashRaw)) };
+                return FixedOutputHash {
+                    .method = FileIngestionMethod::Recursive,
+                    .hash = Hash(string(hashRaw)),
+                };
             } else {
                 std::string_view hashRaw = methodAndHash;
-                return FixedOutputHash { FileIngestionMethod::Flat, Hash(string(hashRaw)) };
+                return FixedOutputHash {
+                    .method = FileIngestionMethod::Flat,
+                    .hash = Hash(string(hashRaw)),
+                };
             }
         } else {
             throw Error("parseContentAddress: format not recognized; has to be text or fixed");
diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index f9b2db2e3..0dfbed9fc 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -1079,7 +1079,7 @@ StorePath LocalStore::addToStoreFromDump(const string & dump, const string & nam
             ValidPathInfo info(dstPath);
             info.narHash = hash.first;
             info.narSize = hash.second;
-            info.ca = FixedOutputHash { method, h };
+            info.ca = FixedOutputHash { .method = method, .hash = h };
             registerValidPath(info);
         }
 
diff --git a/src/nix/add-to-store.cc b/src/nix/add-to-store.cc
index 6d90e93e8..f9d6de16e 100644
--- a/src/nix/add-to-store.cc
+++ b/src/nix/add-to-store.cc
@@ -49,8 +49,8 @@ struct CmdAddToStore : MixDryRun, StoreCommand
         info.narHash = narHash;
         info.narSize = sink.s->size();
         info.ca = std::optional { FixedOutputHash {
-            FileIngestionMethod::Recursive,
-            info.narHash,
+            .method = FileIngestionMethod::Recursive,
+            .hash = info.narHash,
         } };
 
         if (!dryRun) {
diff --git a/src/nix/make-content-addressable.cc b/src/nix/make-content-addressable.cc
index c506eabd8..fb36fc410 100644
--- a/src/nix/make-content-addressable.cc
+++ b/src/nix/make-content-addressable.cc
@@ -83,8 +83,8 @@ struct CmdMakeContentAddressable : StorePathsCommand, MixJSON
             info.narHash = narHash;
             info.narSize = sink.s->size();
             info.ca = FixedOutputHash {
-                FileIngestionMethod::Recursive,
-                info.narHash,
+                .method = FileIngestionMethod::Recursive,
+                .hash = info.narHash,
             };
 
             if (!json)