diff --git a/pkgs/by-name/at/attic-client/package.nix b/pkgs/by-name/at/attic-client/package.nix
index 72096bd19636..51fa7cbe75da 100644
--- a/pkgs/by-name/at/attic-client/package.nix
+++ b/pkgs/by-name/at/attic-client/package.nix
@@ -16,7 +16,7 @@ let
   # Only the attic-client crate builds against the Nix C++ libs
   # This derivation is also used to build the server
   needNixInclude = lib.elem "attic-client" crates;
-  nix = nixVersions.nix_2_28;
+  nix = nixVersions.nix_2_34;
 in
 
 rustPlatform.buildRustPackage {