Describe the bug
During boot, kwalletd5-wrap dumps core: systemd-coredump[1204]: Process 1095 (.kwalletd5-wrap) of user 1000 dumped core.
This prevents kde wallet to authenticate together with my session, and I need to re-enter the password after logging in.

To Reproduce
Steps to reproduce the behavior:

1. Configure system with kde plasma5 and sddm
2. Boot it

Expected behavior

kdewallet should not crash on boot

Additional context

Probably related to #68316.
@tenaf0 in that thread seems to have the same issue.

Display manager info:

• sddm
• plasma5

Metadata

• system: "x86_64-linux"
• host os: Linux 5.4.8-hardened, NixOS, 20.03pre208261.9beb0d1ac2e (Markhor)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.3.2
• channels(rick): ""
• channels(root): "nixos-20.03pre208261.9beb0d1ac2e, nixpkgs-20.03pre207249.7e8454fb856"
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
# a list of nixos modules affected by the problem
module: