Issue with dirname

Guix
1

I’m running into this error

$ guix home -L ~/dotfiles container ./machine_one.scm
ice-9/eval.scm:223:20: In procedure proc:
error: default-home-bash-service: unbound variable
hint: Did you forget `(use-modules (config home .services shells))' or `#:use-module (config home .services shells)'?

~/dotfiles/config/home/home-config.scm

(define-module (config home home-config)
  #:use-module (gnu home)
  #:use-module (gnu home services)
  #:use-module (gnu packages shells)
  #:use-module (guix gexp)
  #:use-module (config home .services shells))

(home-environment
  (services
  (append (list (service default-home-bash-service))))  
                  %base-services)

~/dotfiles/config/home/.services/shells.scm


(define-module (config home services shell)
  #:use-module (gnu home)
  #:use-module (gnu home services shells)
  #:use-module (gnu services)
  #:use-module (guix gexp)
  #:export (bash-service)

(define my-aliases
  '(("sudo" . "sudo ") ("df" . "df -h")
    ("free" . "free -h")
    ("ls" . "ls -ahl")
    ("more" . "less")
    ("pb" . "pbincli send")
    ("to" . "sponge")
    ("vi" . "nvim")
    ("vim" . "nvim")
    ("vimdiff" . "nvim -d")
    ("youtube-dl" . "yt-dlp")
    (".." . "cd ../")))

(define my-bash-env-vars
  '(("PATH" . "/run/setuid-programs:$HOME/.local/bin:$HOME/.cargo/bin:$PATH")))

(define location-bashrc
  (string-append (dirname (current-filename)) "../.config/bash/bashrc"))
(define location-bash_profile
  (string-append (dirname (current-filename)) "../.config/bash/bash_profile"))

(define my-home-bash-service
  (service home-bash-service-type 
           (home-bash-configuration
            (guix-defaults? #f)
            (bash-profile (list (local-file location-bash_profile)))
            (bashrc (list (local-file location-bashrc)))
            (aliases my-aliases)
            (environment-variables my-bash-env-vars))))

Through trial and error I’ve been able to pinpoint the issue to this line:

(define location-bashrc
  (string-append (dirname (current-filename)) "../.config/bash/bashrc"))

Is there a way to figure this out without trial and error?