diff --git a/lix/libexpr/eval.cc b/lix/libexpr/eval.cc
index cab7f6c46..42649c98d 100644
--- a/lix/libexpr/eval.cc
+++ b/lix/libexpr/eval.cc
@@ -268,7 +268,6 @@ EvalState::EvalState(
     std::shared_ptr<Store> buildStore)
     : s(symbols)
     , repair(NoRepair)
-    , derivationInternal(CanonPath("/builtin/derivation.nix"))
     , store(store)
     , buildStore(buildStore ? buildStore : store)
     , regexCache(makeRegexCache())
@@ -1331,13 +1330,10 @@ void ExprSelect::eval(EvalState & state, Env & env, Value & v)
         state.forceValue(*vCurrent, (posCurrent ? posCurrent : this->pos));
 
     } catch (Error & e) {
-        if (posCurrent) {
-            auto pos2r = state.positions[posCurrent];
-            auto origin = std::get_if<SourcePath>(&pos2r.origin);
-            if (!(origin && *origin == state.derivationInternal))
-                e.addTrace(state.positions[posCurrent], "while evaluating the attribute '%1%'",
-                    showAttrPath(state, env, attrPath));
-        }
+        auto pos2r = state.positions[posCurrent];
+        if (pos2r && !std::get_if<Pos::Hidden>(&pos2r.origin))
+            e.addTrace(pos2r, "while evaluating the attribute '%1%'",
+                showAttrPath(state, env, attrPath));
         throw;
     }
 
diff --git a/lix/libexpr/eval.hh b/lix/libexpr/eval.hh
index 06e8aee4e..c5beebdbe 100644
--- a/lix/libexpr/eval.hh
+++ b/lix/libexpr/eval.hh
@@ -284,8 +284,6 @@ public:
      */
     std::optional<PathSet> allowedPaths;
 
-    const SourcePath derivationInternal;
-
     /**
      * Store used to materialise .drv files.
      */
diff --git a/lix/libexpr/primops.cc b/lix/libexpr/primops.cc
index 3934c9ba9..2dce86536 100644
--- a/lix/libexpr/primops.cc
+++ b/lix/libexpr/primops.cc
@@ -2852,7 +2852,7 @@ void EvalState::createBaseEnv()
     char code[] =
         #include "primops/derivation.nix.gen.hh"
         ;
-    eval(*parse(code, sizeof(code), derivationInternal, {CanonPath::root}, staticBaseEnv), *vDerivation);
+    eval(*parse(code, sizeof(code), Pos::Hidden{}, {CanonPath::root}, staticBaseEnv), *vDerivation);
 }
 
 
diff --git a/lix/libutil/position.cc b/lix/libutil/position.cc
index bbeb2e579..cf2ff4b45 100644
--- a/lix/libutil/position.cc
+++ b/lix/libutil/position.cc
@@ -68,6 +68,9 @@ std::optional<std::string> Pos::getSource() const
             } catch (Error &) {
                 return std::nullopt;
             }
+        },
+        [](Hidden) -> std::optional<std::string> {
+            return std::nullopt;
         }
     }, origin);
 }
@@ -79,7 +82,8 @@ void Pos::print(std::ostream & out, bool showOrigin) const
             [&](const std::monostate &) { out << "«none»"; },
             [&](const Pos::Stdin &) { out << "«stdin»"; },
             [&](const Pos::String & s) { out << "«string»"; },
-            [&](const SourcePath & path) { out << path; }
+            [&](const SourcePath & path) { out << path; },
+            [&](Hidden) { out << "«internal»"; },
         }, origin);
         out << ":";
     }
diff --git a/lix/libutil/position.hh b/lix/libutil/position.hh
index 9820ed177..3f89a0f5a 100644
--- a/lix/libutil/position.hh
+++ b/lix/libutil/position.hh
@@ -38,8 +38,11 @@ struct Pos
         bool operator<(const String & rhs) const
         { return *source < *rhs.source; }
     };
+    struct Hidden {
+        auto operator<=>(const Hidden &) const = default;
+    };
 
-    typedef std::variant<std::monostate, Stdin, String, SourcePath> Origin;
+    typedef std::variant<std::monostate, Stdin, String, SourcePath, Hidden> Origin;
 
     Origin origin = std::monostate();