diff --git a/flake.nix b/flake.nix
index 4181286..c923ec8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,10 +18,10 @@
           else []
         ) attrs;
       wrap = drv: { key = drv.outPath; inherit drv; };
-      buildtimeDerivations = drv0: genericClosure {
+      buildtimeDerivations = drv0: map (obj: obj.drv) (genericClosure {
         startSet = map wrap (drvOutputs drv0);
         operator = obj: map wrap (concatLists (drvDeps obj.drv.drvAttrs));
-      };
+      });
       drvMaintainers = drv:
         if ! hasAttr "meta" drv then []
         else if ! hasAttr "maintainers" drv.meta then []
@@ -36,8 +36,7 @@
     bundlers."x86_64-linux" = with self.lib; rec {
       default = adopt;
       maintainers = drv: let
-        deps = buildtimeDerivations drv;
-        drvs = map (dep: dep.drv) deps;
+        drvs = buildtimeDerivations drv;
         maintainers = concatMap drvMaintainers drvs;
         maintainerNames = map maintainerToString maintainers;
         maintainerNamesList = writeText "maintainers" (concatLines maintainerNames);
@@ -46,8 +45,7 @@
         '';
       in uniqNames;
       adopt = drv: let
-        deps = buildtimeDerivations drv;
-        drvs = map (dep: dep.drv) deps;
+        drvs = buildtimeDerivations drv;
         drvsNoMain = filter nobodyMaintains drvs;
         drvNames = map drvToString drvsNoMain;
         drvNamesList = writeText "no-maintainers" (concatLines drvNames);