diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index fecad0b7af93..3530bcf0a379 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -455,7 +455,9 @@ in
 
   atomicparsley = callPackage ../tools/video/atomicparsley { };
 
-  attic = callPackage ../tools/backup/attic { };
+  attic = callPackage ../tools/backup/attic {
+    python3Packages = python34Packages;
+  };
 
   avfs = callPackage ../tools/filesystems/avfs { };