system: install: Always use 'current-guix'.

Fixes <https://issues.guix.gnu.org/53210>.
Reported by Mathieu Othacehe <othacehe@gnu.org>.

* gnu/system/install.scm (%installation-services): Set 'guix' to
use (current-guix) in 'guix-configuration'.
* gnu/system/examples/vm-image.tmpl: Likewise.
* gnu/tests/install.scm (operating-system-with-current-guix): Remove.
(run-install, installation-os-for-gui-tests): Remove its uses.
* Makefile.am (release): Remove intermediate use of
'update-guix-package.scm' and subsequent 'git commit' invocation.

1 files changed, 8 insertions, 1 deletions

diff --git a/gnu/system/examples/vm-image.tmpl b/gnu/system/examples/vm-image.tmpl
index ccb0b045dba..c8449c6e95d 100644
--- a/gnu/system/examples/vm-image.tmpl
+++ b/gnu/system/examples/vm-image.tmpl
@@ -123,7 +123,14 @@ root ALL=(ALL) ALL
                      (login-service-type config =>
                                          (login-configuration
                                           (inherit config)
-                                          (motd vm-image-motd)))))))
+                                          (motd vm-image-motd)))
+
+                     ;; Install and run the current Guix rather than an older
+                     ;; snapshot.
+                     (guix-service-type config =>
+                                        (guix-configuration
+                                         (inherit config)
+                                         (guix (current-guix))))))))
 
   ;; Allow resolution of '.local' host names with mDNS.
   (name-service-switch %mdns-host-lookup-nss))