diff --git a/gnu/build/shepherd.scm b/gnu/build/shepherd.scm
index 461feb06ef..14bdf4edb8 100644
--- a/gnu/build/shepherd.scm
+++ b/gnu/build/shepherd.scm
@@ -150,7 +150,10 @@ (define mounts
     (when log-file
       ;; Create LOG-FILE so we can map it in the container.
       (unless (file-exists? log-file)
-        (call-with-output-file log-file (const #t))))
+        (call-with-output-file log-file (const #t))
+        (when user
+          (let ((pw (getpwnam user)))
+            (chown log-file (passwd:uid pw) (passwd:gid pw))))))
 
     (let ((pid (run-container container-directory
                               mounts namespaces 1