error:
       … while calling the 'derivationStrict' builtin
         at «nix-internal»/derivation-internal.nix:37:12:
           36|
           37|   strict = derivationStrict drvAttrs;
             |            ^
           38|

       … while evaluating derivation 'darwin-system-26.11.15abb8c'
         whose name attribute is located at «git+https://github.com/mulatta/nixpkgs?ref=main&rev=fc72407154499465a0a17863df85ea0d3063e4b1&shallow=1»/pkgs/stdenv/generic/make-derivation.nix:651:11

       … while evaluating attribute 'activationScript' of derivation 'darwin-system-26.11.15abb8c'
         at «github:nix-darwin/nix-darwin/15abb8c98f336cd8bd840d71059adebabe60bf04?narHash=sha256-0tLW8Ff5yt8AH97jw4ZpFJ0OCJ122zIlgWGDmOfU/VU%3D»/modules/system/default.nix:89:7:
           88|
           89|       activationScript = cfg.activationScripts.script.text;
             |       ^
           90|

       … while evaluating the option `system.activationScripts.script.text':

       … while evaluating definitions from `/nix/store/21f6lm3b151nxsniikgsjlvid75vdi67-source/modules/system/activation-scripts.nix':

       … while evaluating the option `system.activationScripts.applications.text':

       … while evaluating definitions from `/nix/store/21f6lm3b151nxsniikgsjlvid75vdi67-source/modules/system/applications.nix':

       … while evaluating the option `environment.systemPackages':

       … while evaluating definitions from `/nix/store/hsa25alkr9cr30is6gs71hy60xpsmnw9-source/machines/rhesus/configuration.nix':

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

       error: undefined variable 'systemctl-macos'
       at /var/lib/nixbot/worktrees/59-15f048be838d-a745a5c3/machines/rhesus/configuration.nix:54:5:
           53|     python3
           54|     systemctl-macos
             |     ^
           55|     tree