diff --git a/guix/scripts/import.scm b/guix/scripts/import.scm
index 7b29794e8f..cf8fc073b2 100644
--- a/guix/scripts/import.scm
+++ b/guix/scripts/import.scm
@@ -109,5 +109,4 @@ (define (guix-import . args)
      (if (member importer importers)
          (let ((expr (apply (resolve-importer importer) args)))
            (pretty-print expr (newline-rewriting-port (current-output-port))))
-         (format (current-error-port)
-                 (_ "guix import: invalid importer~%"))))))
+         (leave (_ "~a: invalid importer~%") importer)))))