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Co-authored-by: Eelco Dolstra <edolstra@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libstore/build/derivation-goal.cc b/src/libstore/build/derivation-goal.cc
index 953e241d8..fa8b99118 100644
--- a/src/libstore/build/derivation-goal.cc
+++ b/src/libstore/build/derivation-goal.cc
@@ -3291,7 +3291,7 @@ void DerivationGoal::registerOutputs()
 
         auto localStoreP = dynamic_cast<LocalStore *>(&worker.store);
         if (!localStoreP)
-            Unsupported("Can only register outputs with local store");
+            throw Unsupported("can only register outputs with local store, but this is %s", worker.store.getUri());
         auto & localStore = *localStoreP;
 
         if (buildMode == bmCheck) {
@@ -3426,7 +3426,7 @@ void DerivationGoal::registerOutputs()
     {
         auto localStoreP = dynamic_cast<LocalStore *>(&worker.store);
         if (!localStoreP)
-            Unsupported("Can only register outputs with local store");
+            throw Unsupported("can only register outputs with local store, but this is %s", worker.store.getUri());
         auto & localStore = *localStoreP;
 
         ValidPathInfos infos2;