%#! lualatex -shell-escape luatex.ins
\input docstrip.tex
\askforoverwritefalse
\generate{\file{luatexja-ja.tex}{\from{luatexja.dtx}{ja}}
          \file{luatexja-en.tex}{\from{luatexja.dtx}{en}}
          \file{showexpl.cfg}{\from{luatexja.dtx}{showexpl}}
}
\immediate\write18{lualatex luatexja-ja}
\immediate\write18{lualatex luatexja-en}
\endbatchfile
