error:
       … while evaluating a branch condition
         at «string»:23:10:
           22|     if !keepName n then {}
           23|     else if !builtins.isAttrs c || isDrv c then c
             |          ^
           24|     else if c ? _type || !(c.recurseForDerivations or true) then {}

       … in the left operand of the OR (||) operator
         at «string»:23:33:
           22|     if !keepName n then {}
           23|     else if !builtins.isAttrs c || isDrv c then c
             |                                 ^
           24|     else if c ? _type || !(c.recurseForDerivations or true) then {}

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: attribute 'x86_64-linux' missing
       at /var/lib/nixbot/worktrees/18-a4e348a85d38-21f0b217/flake.nix:53:26:
           52|
           53|         checks.default = packages.default.x86_64-linux;
             |                          ^
           54|