2 files changed, 3 insertions, 1 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. */