1 files changed, 9 insertions, 9 deletions

diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index b6e889e15..98742e0c8 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -718,14 +718,14 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
         if (outputs.size() != 1 || *(outputs.begin()) != "out")
             throw Error(format("multiple outputs are not supported in fixed-output derivations, at %1%") % posDrvName);
 
-        HashType ht = outputHashAlgo.empty() ? HashType::Unknown : parseHashType(outputHashAlgo);
+        std::optional<HashType> ht = parseHashTypeOpt(outputHashAlgo);
         Hash h(*outputHash, ht);
 
         auto outPath = state.store->makeFixedOutputPath(ingestionMethod, h, drvName);
         if (!jsonObject) drv.env["out"] = state.store->printStorePath(outPath);
         drv.outputs.insert_or_assign("out", DerivationOutput(
-                std::move(outPath),
-                FileSystemHash(ingestionMethod, std::move(h))));
+            std::move(outPath),
+            FileSystemHash(ingestionMethod, std::move(h))));
     }
 
     else {
@@ -931,14 +931,14 @@ static void prim_findFile(EvalState & state, const Pos & pos, Value * * args, Va
 static void prim_hashFile(EvalState & state, const Pos & pos, Value * * args, Value & v)
 {
     string type = state.forceStringNoCtx(*args[0], pos);
-    HashType ht = parseHashType(type);
-    if (ht == HashType::Unknown)
+    std::optional<HashType> ht = parseHashType(type);
+    if (!ht)
       throw Error(format("unknown hash type '%1%', at %2%") % type % pos);
 
     PathSet context; // discarded
     Path p = state.coerceToPath(pos, *args[1], context);
 
-    mkString(v, hashFile(ht, state.checkSourcePath(p)).to_string(Base::Base16, false), context);
+    mkString(v, hashFile(*ht, state.checkSourcePath(p)).to_string(Base::Base16, false), context);
 }
 
 /* Read a directory (without . or ..) */
@@ -1809,14 +1809,14 @@ static void prim_stringLength(EvalState & state, const Pos & pos, Value * * args
 static void prim_hashString(EvalState & state, const Pos & pos, Value * * args, Value & v)
 {
     string type = state.forceStringNoCtx(*args[0], pos);
-    HashType ht = parseHashType(type);
-    if (ht == HashType::Unknown)
+    std::optional<HashType> ht = parseHashType(type);
+    if (!ht)
       throw Error(format("unknown hash type '%1%', at %2%") % type % pos);
 
     PathSet context; // discarded
     string s = state.forceString(*args[1], context, pos);
 
-    mkString(v, hashString(ht, s).to_string(Base::Base16, false), context);
+    mkString(v, hashString(*ht, s).to_string(Base::Base16, false), context);
 }