Hello Guix,
I'm trying to create an installation image that uses Network Manager to
configure networking (For use at a site with WPA-Enterprise networks). I
came up with the following:
```scheme
(define-module (jackhill system install)
#:use-module ((gnu packages gnome) #:select (network-manager) #:prefix
package:)
#:use-module (gnu services)
#:use-module (gnu services networking)
#:use-module (gnu system)
#:use-module (gnu system install)
#:use-module (srfi srfi-1)
#:export (my-installation-os))
(define my-installation-os
(operating-system
(inherit installation-os)
(packages (cons package:network-manager
(operating-system-packages installation-os)))
(services (cons (service network-manager-service-type)
(remove (lambda (service)
(eq? (service-kind service) connman-service-type))
(operating-system-services installation-os))))))
my-installation-os
```
However, passing that to guix system disk-image results in:
```
guix system: error: more than one target service of type 'shepherd-root'
```
Thinking that I had done something wrong with removing the connman-service
and adding the network-manager-service, I created a more minimal operating
system definition:
```scheme
(define my-installation-os
(operating-system
(inherit installation-os)
(packages (cons package:network-manager
(operating-system-packages installation-os)))
(services (operating-system-services installation-os))))
```
To my surprise, this also fails with
```
guix system: error: more than one target service of type 'account'
```
However,
```scheme
(define my-installation-os
(operating-system
(inherit installation-os)
(packages (cons package:network-manager
(operating-system-packages installation-os)))))
```
sucseeds.
Should these last two operating system definitions not be equivalent?
What's going on here?
Thanks,
Jack
