3 files changed, 7 insertions, 5 deletions
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index 0cdce602d7b2..ca4c9a373a3a 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -293,6 +293,7 @@ EvalState::EvalState(const Strings & _searchPath, ref<Store> store)
     , sWrong(symbols.create("wrong"))
     , sStructuredAttrs(symbols.create("__structuredAttrs"))
     , sBuilder(symbols.create("builder"))
+    , repair(NoRepair)
     , store(store)
     , baseEnv(allocEnv(128))
     , staticBaseEnv(false, 0)
diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index 46d5a1cc866c..1e32db1e86bd 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -14,6 +14,7 @@ namespace nix {
 
 class Store;
 class EvalState;
+enum RepairFlag : bool;
 
 
 typedef void (* PrimOpFun) (EvalState & state, const Pos & pos, Value * * args, Value & v);
@@ -73,7 +74,7 @@ public:
 
     /* If set, force copying files to the Nix store even if they
        already exist there. */
-    bool repair = false;
+    RepairFlag repair;
 
     /* If set, don't allow access to files outside of the Nix search
        path or to environment variables. */
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index f240e795ee79..78d73e1f5572 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -708,8 +708,8 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
         HashType ht = parseHashType(outputHashAlgo);
         if (ht == htUnknown)
             throw EvalError(format("unknown hash algorithm ‘%1%’, at %2%") % outputHashAlgo % posDrvName);
-        Hash h = parseHash16or32(ht, *outputHash);
-        outputHash = printHash(h);
+        Hash h(*outputHash, ht);
+        outputHash = h.to_string(Base16, false);
         if (outputHashRecursive) outputHashAlgo = "r:" + outputHashAlgo;
 
         Path outPath = state.store->makeFixedOutputPath(outputHashRecursive, h, drvName);
@@ -1701,7 +1701,7 @@ static void prim_hashString(EvalState & state, const Pos & pos, Value * * args,
     PathSet context; // discarded
     string s = state.forceString(*args[1], context, pos);
 
-    mkString(v, printHash(hashString(ht, s)), context);
+    mkString(v, hashString(ht, s).to_string(Base16, false), context);
 }
 
 
@@ -1857,7 +1857,7 @@ void fetch(EvalState & state, const Pos & pos, Value * * args, Value & v,
             if (n == "url")
                 url = state.forceStringNoCtx(*attr.value, *attr.pos);
             else if (n == "sha256")
-                expectedHash = parseHash16or32(htSHA256, state.forceStringNoCtx(*attr.value, *attr.pos));
+                expectedHash = Hash(state.forceStringNoCtx(*attr.value, *attr.pos), htSHA256);
             else if (n == "name")
                 name = state.forceStringNoCtx(*attr.value, *attr.pos);
             else