diff --git a/guix/build/qt-utils.scm b/guix/build/qt-utils.scm
index f52e3f7af5..7d1b0e0e23 100644
--- a/guix/build/qt-utils.scm
+++ b/guix/build/qt-utils.scm
@@ -90,7 +90,7 @@ (define exists? (match file-type
     '("XDG_CONFIG_DIRS" suffix directory "/etc/xdg")
     `("QT_PLUGIN_PATH" prefix directory
       ,(format #f "/lib/qt~a/plugins" qt-major-version))
-    `("QML2_IMPORT_PATH" = directory
+    `("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.