diff --git a/gnu/packages/video.scm b/gnu/packages/video.scm
index 61b1b0228c..3ab1ed7bad 100644
--- a/gnu/packages/video.scm
+++ b/gnu/packages/video.scm
@@ -1765,10 +1765,9 @@ capabilities.")
     (arguments
      '(#:phases
        (modify-phases %standard-phases
-         (add-after
-          'unpack 'autogen
-          (lambda _
-            (zero? (system* "sh" "autogen.sh")))))))
+         (add-after 'unpack 'autogen
+           (lambda _
+             (invoke "sh" "autogen.sh"))))))
     (home-page "http://www.vapoursynth.com/")
     (synopsis "Video processing framework")
     (description "VapourSynth is a C++ library and Python module for video