gnu: libsbsms: Use modify-phases.

* gnu/packages/audio.scm (libsbsms)[arguments]: Use modify-phases.

gnu/packages/audio.scm

@@ -3,6 +3,7 @@
 ;;; Copyright © 2015 Taylan Ulrich Bayırlı/Kammer <taylanbayirli@gmail.com>
 ;;; Copyright © 2015 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2015 Alex Kost <alezost@gmail.com>
+;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -1375,7 +1376,8 @@ analysis plugins or audio feature extraction plugins.")
     (native-inputs `(("automake" ,automake)))
     (arguments
      `(#:phases
-       (alist-cons-after
+       (modify-phases %standard-phases
+         (add-after
           'unpack 'fix-ar-lib-path
           (lambda* (#:key inputs #:allow-other-keys)
             ;; Originally a symlink to '/usr/local/share/automake-1.12/ar-lib'.
@@ -1383,8 +1385,7 @@ analysis plugins or audio feature extraction plugins.")
             (symlink
              (string-append (assoc-ref inputs "automake") "/share/automake-"
                             ,(package-version automake) "/ar-lib")
-           "ar-lib"))
-        %standard-phases)))
+             "ar-lib"))))))
     (home-page "http://sbsms.sourceforge.net/")
     (synopsis "Library for time stretching and pitch scaling of audio")
     (description