u/Fearless_School_5856

Introducing the mega Nonguix :P

Here're what you'll need, details in the post.

Guix System

(operating-system
  ...
  (packages
   (with-nix-profile
    (append (list (nix-shell-wrapper "ghostty"
                    '("github:NixOS/nixpkgs/nixos-26.05#ghostty")
                    #:run-command '("ghostty")))
            ...)))
  (services
   (append (list (service nix-service-type)
                 (service nix-search-paths-service-type))
           ...)))

Guix Home

(home-environment
  ...
  (packages
   (with-nix-profile
    (append (list (nix-shell-wrapper "ghostty"
                    '("github:NixOS/nixpkgs/nixos-26.05#ghostty")
                    #:run-command '("ghostty")))
            ...)))
  (services
   (append (list (service home-nix-search-paths-service-type))
           ...)))