diff --git a/guix/build/qt-utils.scm b/guix/build/qt-utils.scm
index 7d1b0e0e238..8962c0edb85 100644
--- a/guix/build/qt-utils.scm
+++ b/guix/build/qt-utils.scm
@@ -3,8 +3,7 @@
 ;;; Copyright © 2019, 2020, 2021 Hartmut Goebel <h.goebel@crazy-compilers.com>
 ;;; Copyright © 2020 Jakub Kądziołka <kuba@kadziolka.net>
 ;;; Copyright © 2021 Ludovic Courtès <ludo@gnu.org>
-;;; Copyright © 2021, 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
-;;; Copyright © 2021, 2022, 2023 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;; Copyright © 2021, 2022, 2023, 2024 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2021 Brendan Tildesley <mail@brendan.scot>
 ;;;
 ;;; This file is part of GNU Guix.
@@ -90,8 +89,10 @@
     '("XDG_CONFIG_DIRS" suffix directory "/etc/xdg")
     `("QT_PLUGIN_PATH" prefix directory
       ,(format #f "/lib/qt~a/plugins" qt-major-version))
-    `("QML2_IMPORT_PATH" prefix directory
-      ,(format #f "/lib/qt~a/qml" qt-major-version))
+    `(,(if (>= 6 (string->number qt-major-version))
+           "QML_IMPORT_PATH"
+           "QML2_IMPORT_PATH")
+      prefix directory ,(format #f "/lib/qt~a/qml" qt-major-version))
     ;; QTWEBENGINEPROCESS_PATH accepts a single value, which makes 'exact the
     ;; most suitable environment variable type for it.
     `("QTWEBENGINEPROCESS_PATH" = regular