dtx + dox package fail to compile with any of the -dev engines

[Robert Alessi]

Dear List,

Something happened with today's update.

Any of the -dev engines fail to compile the attached .dtx file if the
“dox” package is loaded, but I am not sure the failure is caused by
this package.

(pdf|xe|lua)latex-dev engines seem to bump into \@doc at describe which
is defined in doc-v3beta.sty.

Thank you for your help.

Best,

Robert

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%<*driver>
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%<package>\NeedsTeXFormat{LaTeX2e}[2005/12/01]
%<package>\ProvidesPackage{skeleton}
%<*package>
    [2004/11/05 v1.0 .dtx skeleton file]
%</package>
%
%<*driver>
\documentclass{ltxdoc}
\usepackage{dox}
\EnableCrossrefs         
\CodelineIndex
\RecordChanges
\begin{document}
  \DocInput{skeleton.dtx}
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  \PrintIndex
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