diff --git a/asdf.asd b/asdf.asd
index 2b613deb7cc1c49b41442089c994db546aaed04a..a5717821bdaf4cbe42d676a80f9c3b7a99e73b7d 100644
--- a/asdf.asd
+++ b/asdf.asd
@@ -74,7 +74,7 @@
   :licence "MIT"
   :description "Another System Definition Facility"
   :long-description "ASDF builds Common Lisp software organized into defined systems."
-  :version "2.33.8" ;; to be automatically updated by make bump-version
+  :version "2.33.9" ;; to be automatically updated by make bump-version
   :depends-on ()
   #+asdf3 :encoding #+asdf3 :utf-8
   ;; For most purposes, asdf itself specially counts as a builtin system.
diff --git a/backward-interface.lisp b/backward-interface.lisp
index 3736008aabe41593e2bb3e036924192fbee13b4c..317555106150303086cc678c5e6ac842b7820c33 100644
--- a/backward-interface.lisp
+++ b/backward-interface.lisp
@@ -3,9 +3,9 @@
 
 (asdf/package:define-package :asdf/backward-interface
   (:recycle :asdf/backward-interface :asdf)
-  (:use :asdf/common-lisp :asdf/driver :asdf/upgrade
+  (:use :uiop/common-lisp :uiop :asdf/upgrade
    :asdf/component :asdf/system :asdf/find-system :asdf/operation :asdf/action
-   :asdf/lisp-build :asdf/operate :asdf/output-translations)
+   :asdf/lisp-action :asdf/operate :asdf/output-translations)
   (:export
    #:*asdf-verbose*
    #:operation-error #:compile-error #:compile-failed #:compile-warned
@@ -13,8 +13,7 @@
    #:component-load-dependencies
    #:enable-asdf-binary-locations-compatibility
    #:operation-forced
-   #:operation-on-failure
-   #:operation-on-warnings
+   #:operation-on-failure #:operation-on-warnings #:on-failure #:on-warnings
    #:component-property
    #:run-shell-command
    #:system-definition-pathname))
diff --git a/header.lisp b/header.lisp
index 63c82494a8654471d259f160fe6dd82ece70b5f1..5c0061071fe0c080f19b7f7c73cd6226ae4726ab 100644
--- a/header.lisp
+++ b/header.lisp
@@ -1,5 +1,5 @@
 ;;; -*- mode: Common-Lisp; Base: 10 ; Syntax: ANSI-Common-Lisp -*-
-;;; This is ASDF 2.33.8: Another System Definition Facility.
+;;; This is ASDF 2.33.9: Another System Definition Facility.
 ;;;
 ;;; Feedback, bug reports, and patches are all welcome:
 ;;; please mail to <asdf-devel@common-lisp.net>.
diff --git a/upgrade.lisp b/upgrade.lisp
index 4ac0aa5b33bd3835bd86670dc40a8fdc9e38d6d1..231813fe49e7d2b5856343562d74cffa2b28499e 100644
--- a/upgrade.lisp
+++ b/upgrade.lisp
@@ -52,7 +52,7 @@ You can compare this string with e.g.: (ASDF:VERSION-SATISFIES (ASDF:ASDF-VERSIO
          ;; "3.4.5.67" would be a development version in the official upstream of 3.4.5.
          ;; "3.4.5.0.8" would be your eighth local modification of official release 3.4.5
          ;; "3.4.5.67.8" would be your eighth local modification of development version 3.4.5.67
-         (asdf-version "2.33.8")
+         (asdf-version "2.33.9")
          (existing-version (asdf-version)))
     (setf *asdf-version* asdf-version)
     (when (and existing-version (not (equal asdf-version existing-version)))
diff --git a/version.lisp-expr b/version.lisp-expr
index c3d86fdc66d1b56b28b8d16b35f3aa7e27fae483..a039f6100828174cebbcd3cc68d1dd01346e3c33 100644
--- a/version.lisp-expr
+++ b/version.lisp-expr
@@ -1 +1 @@
-"2.33.8"
+"2.33.9"