diff --git a/src/nix/installables.cc b/src/nix/installables.cc
index 0be992b03..0c1ad3ab3 100644
--- a/src/nix/installables.cc
+++ b/src/nix/installables.cc
@@ -96,7 +96,7 @@ struct InstallableStorePath : Installable
 
     Buildables toBuildables() override
     {
-        return {{"", {{"out", storePath}}}};
+        return {{isDerivation(storePath) ? storePath : "", {{"out", storePath}}}};
     }
 };