diff --git a/doc/guix.texi b/doc/guix.texi
index 12f155e912..8aa0b5e3ba 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -33999,6 +33999,17 @@ Web Services
 @item @code{mumi} (default: @code{mumi})
 The Mumi package to use.
 
+@item @code{data-directory} (default: @file{"/var/mumi/data"})
+Data directory to store Debbugs data from upstream Debbugs instance.
+
+@item @code{rsync-remote}
+Remote rsync path from which to download Debbugs data.  The remote is
+polled every 2 minutes, unless a previous instance of rsync is already
+running.
+
+@item @code{rsync-flags} (default: @code{'()})
+Additional flags to pass to @command{rsync}.
+
 @item @code{mailer?} (default: @code{#true})
 Whether to enable or disable the mailer component.
 
diff --git a/gnu/services/web.scm b/gnu/services/web.scm
index f8cf06fb48..3f0eb8780a 100644
--- a/gnu/services/web.scm
+++ b/gnu/services/web.scm
@@ -18,6 +18,7 @@
 ;;; Copyright © 2023 Bruno Victal <mirai@makinata.eu>
 ;;; Copyright © 2023 Miguel Ángel Moreno <mail@migalmoreno.com>
 ;;; Copyright © 2024 Leo Nikkilä <hello@lnikki.la>
+;;; Copyright © 2025 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -51,6 +52,7 @@ (define-module (gnu services web)
   #:use-module (gnu packages php)
   #:use-module (gnu packages python)
   #:use-module (gnu packages python-web)
+  #:use-module (gnu packages rsync)
   #:use-module (gnu packages gnupg)
   #:use-module (gnu packages guile)
   #:use-module (gnu packages logging)
@@ -295,6 +297,9 @@ (define-module (gnu services web)
             mumi-configuration
             mumi-configuration?
             mumi-configuration-mumi
+            mumi-configuration-data-directory
+            mumi-configuration-rsync-remote
+            mumi-configuration-rsync-flags
             mumi-configuration-mailer?
             mumi-configuration-sender
             mumi-configuration-smtp
@@ -2033,6 +2038,11 @@ (define-record-type* <mumi-configuration>
   mumi-configuration make-mumi-configuration
   mumi-configuration?
   (mumi    mumi-configuration-mumi (default mumi))
+  (data-directory mumi-configuration-data-directory
+                  (default "/var/mumi/data"))
+  (rsync-remote mumi-configuration-rsync-remote)
+  (rsync-flags mumi-configuration-rsync-flags
+               (default '()))
   (mailer? mumi-configuration-mailer? (default #t))
   (sender  mumi-configuration-sender (default #f))
   (smtp    mumi-configuration-smtp (default #f))
@@ -2080,7 +2090,7 @@ (define %mumi-log "/var/log/mumi.log")
 
 (define %mumi-mailer-log "/var/log/mumi.mailer.log")
 
-(define %mumi-worker-log "/var/log/mumi.worker.log")
+(define %mumi-rsync-and-index-log "/var/log/mumi.rsync-and-index.log")
 
 (define mumi-package-configuration->alist
   (match-record-lambda <mumi-package-configuration>
@@ -2118,6 +2128,24 @@ (define mumi-config-file
                                           packages)))
                               <>))))))
 
+(define (mumi-rsync-and-index config)
+  (match-record config <mumi-configuration>
+    (data-directory rsync-remote rsync-flags)
+    (program-file "mumi-rsync-and-index"
+                  (with-imported-modules '((guix build utils))
+                    #~(begin
+                        (use-modules (guix build utils))
+
+                        (invoke #$(file-append rsync "/bin/rsync")
+                                "--delete" "--archive" "--verbose"
+                                "--timeout" "120"
+                                #$@rsync-flags
+                                #$rsync-remote
+                                #$data-directory)
+                        (invoke #$(file-append mumi "/bin/mumi") "fetch"
+                                (string-append "--config="
+                                               #$(mumi-config-file config))))))))
+
 (define (mumi-shepherd-services config)
   (define environment
     #~(list "LC_ALL=en_US.utf8"
@@ -2140,17 +2168,19 @@ (define (mumi-shepherd-services config)
                       #:log-file #$%mumi-log))
             (stop #~(make-kill-destructor)))
            (shepherd-service
-            (provision '(mumi-worker))
-            (documentation "Mumi bug-tracking web interface database worker.")
-            (requirement '(user-processes networking))
-            (start #~(make-forkexec-constructor
-                      `(#$(file-append mumi "/bin/mumi") "worker"
-                        ,(string-append "--config="
-                                        #$(mumi-config-file config)))
-                      #:environment-variables #$environment
-                      #:user "mumi" #:group "mumi"
-                      #:log-file #$%mumi-worker-log))
-            (stop #~(make-kill-destructor)))
+            (provision '(mumi-rsync-and-index))
+            (modules '((shepherd service timer)))
+            (start #~(make-timer-constructor
+                      ;; Run every 2 minutes, unless an instance of this job
+                      ;; is already running.
+                      (calendar-event #:minutes (iota 30 0 2))
+                      (command #$(mumi-rsync-and-index config))
+                      #:log-file #$%mumi-rsync-and-index-log
+                      #:max-duration (* 60 60)
+                      #:wait-for-termination? #t))
+            (stop #~(make-timer-destructor))
+            (actions (list shepherd-trigger-action))
+            (documentation "Rsync and index the GNU Debbugs data"))
            (shepherd-service
             (provision '(mumi-mailer))
             (documentation "Mumi bug-tracking web interface mailer.")
@@ -2181,9 +2211,7 @@ (define mumi-service-type
           (service-extension shepherd-root-service-type
                              mumi-shepherd-services)))
    (description
-    "Run Mumi, a Web interface to the Debbugs bug-tracking server.")
-   (default-value
-     (mumi-configuration))))
+    "Run Mumi, a Web interface to the Debbugs bug-tracking server.")))
 
 (define %default-gmnisrv-config-file
   (plain-file "gmnisrv.ini" "
