1 files changed, 6 insertions, 4 deletions
diff --git a/src/libexpr/eval-cache.hh b/src/libexpr/eval-cache.hh
index afee85fa9..43b34ebcb 100644
--- a/src/libexpr/eval-cache.hh
+++ b/src/libexpr/eval-cache.hh
@@ -9,7 +9,9 @@
 
 namespace nix::eval_cache {
 
-class AttrDb;
+MakeError(CachedEvalError, EvalError);
+
+struct AttrDb;
 class AttrCursor;
 
 class EvalCache : public std::enable_shared_from_this<EvalCache>
@@ -92,15 +94,15 @@ public:
 
     std::string getAttrPathStr(Symbol name) const;
 
-    std::shared_ptr<AttrCursor> maybeGetAttr(Symbol name);
+    std::shared_ptr<AttrCursor> maybeGetAttr(Symbol name, bool forceErrors = false);
 
     std::shared_ptr<AttrCursor> maybeGetAttr(std::string_view name);
 
-    std::shared_ptr<AttrCursor> getAttr(Symbol name);
+    std::shared_ptr<AttrCursor> getAttr(Symbol name, bool forceErrors = false);
 
     std::shared_ptr<AttrCursor> getAttr(std::string_view name);
 
-    std::shared_ptr<AttrCursor> findAlongAttrPath(const std::vector<Symbol> & attrPath);
+    std::shared_ptr<AttrCursor> findAlongAttrPath(const std::vector<Symbol> & attrPath, bool force = false);
 
     std::string getString();