1 files changed, 3 insertions, 1 deletions
diff --git a/src/libstore/local-store.cc b/src/libstore/local-store.cc
index d1a3b95c1..155c537a5 100644
--- a/src/libstore/local-store.cc
+++ b/src/libstore/local-store.cc
@@ -563,7 +563,9 @@ void LocalStore::checkDerivationOutputs(const StorePath & drvPath, const Derivat
     }
 
     else {
-        Hash h = hashDerivationModulo(*this, drv, true);
+        // Regular, non-CA derivation should always return a single hash and not
+        // hash per output.
+        Hash h = std::get<0>(hashDerivationModulo(*this, drv, true));
         for (auto & i : drv.outputs)
             check(makeOutputPath(i.first, h, drvName), i.second.path(*this, drv.name), i.first);
     }