services: Fix 'mkdir-p' in activation scripts.

* gnu/services/cups.scm (%cups-activation): Import (guix build utils).
* gnu/services/mail.scm (opensmtpd-activation): Idem.
* gnu/services/networking.scm (ntp-service-activation): Idem.
* gnu/services/spice.scm (spice-vdagent-activation): Idem.
* gnu/services/ssh.scm (openssh-activation): Idem.
  (dropbear-activation): Idem.
* gnu/services/vpn.scm (%openvpn-activation): Idem.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/services/cups.scm

@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2016 Andy Wingo <wingo@pobox.com>
+;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -811,6 +812,7 @@ (define %cups-activation
   ;; Activation gexp.
   (with-imported-modules '((guix build utils))
     #~(begin
+        (use-modules (guix build utils))
         (define (mkdir-p/perms directory owner perms)
           (mkdir-p directory)
           (chown "/var/run/cups" (passwd:uid owner) (passwd:gid owner))

gnu/services/mail.scm

@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2015 Andy Wingo <wingo@igalia.com>
+;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -1601,6 +1602,7 @@ (define opensmtpd-activation
     (($ <opensmtpd-configuration> package config-file)
      (let ((smtpd (file-append package "/sbin/smtpd")))
        #~(begin
+           (use-modules (guix build utils))
            ;; Create mbox and spool directories.
            (mkdir-p "/var/mail")
            (mkdir-p "/var/spool/smtpd")

gnu/services/networking.scm

@@ -3,6 +3,7 @@
 ;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2016 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2016 John Darrington <jmd@gnu.org>
+;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -332,6 +333,7 @@ (define (ntp-service-activation config)
   "Return the activation gexp for CONFIG."
   (with-imported-modules '((guix build utils))
     #~(begin
+        (use-modules (guix build utils))
         (define %user
           (getpw "ntpd"))
 

gnu/services/spice.scm

@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2016 David Craven <david@craven.ch>
+;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -35,7 +36,9 @@ (define-record-type* <spice-vdagent-configuration>
 
 (define (spice-vdagent-activation config)
   "Return the activation gexp for CONFIG."
-  #~(mkdir-p "/var/run/spice-vdagentd"))
+  #~(begin
+      (use-modules (guix build utils))
+      (mkdir-p "/var/run/spice-vdagentd")))
 
 (define (spice-vdagent-shepherd-service config)
   "Return a <shepherd-service> for spice-vdagentd with CONFIG."

gnu/services/ssh.scm

@@ -2,6 +2,7 @@
 ;;; Copyright © 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2016 David Craven <david@craven.ch>
 ;;; Copyright © 2016 Julien Lepiller <julien@lepiller.eu>
+;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -292,6 +293,7 @@ (define %openssh-accounts
 (define (openssh-activation config)
   "Return the activation GEXP for CONFIG."
   #~(begin
+      (use-modules (guix build utils))
       (mkdir-p "/etc/ssh")
       (mkdir-p (dirname #$(openssh-configuration-pid-file config)))
 
@@ -388,6 +390,7 @@ (define-record-type* <dropbear-configuration>
 (define (dropbear-activation config)
   "Return the activation gexp for CONFIG."
   #~(begin
+      (use-modules (guix build utils))
       (mkdir-p "/etc/dropbear")))
 
 (define (dropbear-shepherd-service config)

gnu/services/vpn.scm

@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2017 Julien Lepiller <julien@lepiller.eu>
+;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -444,7 +445,9 @@ (define %openvpn-accounts
          (shell (file-append shadow "/sbin/nologin")))))
 
 (define %openvpn-activation
-  #~(mkdir-p "/var/run/openvpn"))
+  #~(begin
+      (use-modules (guix build utils))
+      (mkdir-p "/var/run/openvpn")))
 
 (define openvpn-server-service-type
   (service-type (name 'openvpn-server)