bug#37357: Guix gc removes next-gtk-webkit input with next installed

[Dimakakos Dimos]

After running gc and trying to launch next-browser I get:

<INFO> [19:11:29] next base.lisp (start) - NEXT::+VERSION+: "1.3.1" 
 <INFO> [19:11:29] next base.lisp (load-lisp-file form-fun-4) -
  Loading configuration from /home/bendersteed/.config/next/init.lisp...
 <WARN> [19:11:30] next minibuffer.lisp (echo) -
  Can't echo 'MINIBUFFER-MODE enabled.' without minibuffer or interface
 <INFO> [19:11:30] next remote.lisp (ensure-dbus-session form-fun-4) -
  Bus connection name: :1.103
 <INFO> [19:11:30] next remote.lisp (initialize-instance :after 
remote-interface) -
  Bus connection name: :1.104
 <INFO> [19:11:30] next port.lisp (run-program port) -
  Current directory: /home/bendersteed/
 <INFO> [19:11:30] next port.lisp (run-program port) -
  Platform port path: 
/gnu/store/5hh6qpp4lqa6gy1ghdb4ppvjamgb3mbc-next-gtk-webkit-1.3.1/bin/next-gtk-webkit
 <INFO> [19:11:30] next port.lisp (run-program port) -
  Platform port arguments: NIL
 <INFO> [19:11:30] next port.lisp (run-program port) -
  Platform port log file: 
/home/bendersteed/.local/share/next/next-gtk-webkit.log
<ERROR> [19:11:30] next base.lisp (initialize-port remote-interface fun24) -
  Couldn't execute 
"/gnu/store/5hh6qpp4lqa6gy1ghdb4ppvjamgb3mbc-next-gtk-webkit-1.3.1/bin/next-gtk-webkit":
 No such file or directory
Make sure the platform port executable is either in the
PATH or set in you ~/.config/next/init.lisp, for instance:

     (setf (get-default 'port 'path)
         "~/common-lisp/next/ports/gtk-webkit/next-gtk-webkit")
; 
; compilation unit aborted
;   caught 1 fatal ERROR condition

Obviously the package should be live and not be picked up by gc, since
it's an input of a package in a current profile. Any ideas why that
could happen?