XFCE4+LightDM fails to build on `i686-linux` when built from `x86_64-linux` for NixOS 20.04

[Kreyren]

LOG: https://gist.githubusercontent.com/Kreyren/608b7985e6883043bc5dacf7e66b71a6/raw/7538f29e22dc780b331e59f121d0a7f9805b3d8c/gistfile1.txt

LOG from build on 21.11: https://gist.githubusercontent.com/Kreyren/bdf30b9062f48c2f2ee7bba4fcf2ae31/raw/f748cb76530b0f94cc3204a2fe131899e80c50c7/gistfile1.txt

Steps To Reproduce

1. Set the following in configuration.nix:

services = {
        xserver = {
            enable = true;
            desktopManager = {
                xterm.enable = false;
                xfce.enable = true;
            };
            displayManager = {
                defaultSession = "xfce";
                lightdm.enable = true;
            };
        };
    };

1. Build for i686-linux and wait for it to fail

Additional context

Built on 86_64-linux system for i686-linux

Metadata

Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

[root@gigatom:/etc/nixos]# nix-shell -p nix-info --run "nix-info -m"
 - system: `"i686-linux"`
 - host os: `Linux 5.10.48, NixOS, 21.05.1555.6b940846e99 (Okapi)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.3.12`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

[Kreyren]

CC @grahamc as xfce4 does not have maintainers to my knowledge and i don't know what is the nix-way to handle these issues.

[stale[bot]]

I marked this as stale due to inactivity. → More info