diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index cdd9a3a09..1197b6e13 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -112,7 +112,7 @@ StringMap EvalState::realiseContext(const NixStringContext & context)
     for (auto & outputPath : outputsToCopyAndAllow) {
         /* Add the output of this derivations to the allowed
            paths. */
-        allowPath(store->toRealPath(outputPath));
+        allowPath(outputPath);
     }
 
     return res;