diff --git a/build.lua b/build.lua
index 7ea1130..7519275 100644
--- a/build.lua
+++ b/build.lua
@@ -44,7 +44,7 @@ specialformats.latex = {
   },
 }
 
-installfiles = {"plexpl3.ltx","plexpl3.sty"}
+installfiles = {"plexpl3.ltx","plexpl3.sty","plpatch3.sty"}
 
 typesetexe  = "platex"
 typesetopts = " -interaction=nonstopmode -halt-on-error -kanji=utf8 "
diff --git a/plexpl3.ins b/plexpl3.ins
index 4632723..7d48ca3 100644
--- a/plexpl3.ins
+++ b/plexpl3.ins
@@ -32,10 +32,11 @@ This file is part of the pLaTeX2e system (community edition).
     \file{plexpl3.ltx}
       {
         \from{plexpl3.dtx} {code}
-        \from{plpatch3.dtx}{package}
+        \from{plpatch3.dtx}{code}
       }
   }
 
 \generate{\file{plexpl3.sty}     {\from{plexpl3.dtx}     {package}}}
+\generate{\file{plpatch3.sty}    {\from{plpatch3.dtx}    {package}}}
 
 \endbatchfile
diff --git a/plpatch3.dtx b/plpatch3.dtx
index f6daaaf..941ffcc 100644
--- a/plpatch3.dtx
+++ b/plpatch3.dtx
@@ -28,7 +28,7 @@
 %    }^^A
 % }
 %
-% \date{Released 2023-02-11}
+% \date{Released 2023-02-18}
 %
 % \maketitle
 %
@@ -41,6 +41,15 @@
 %
 %    \begin{macrocode}
 %<*package>
+\NeedsTeXFormat{pLaTeX2e}
+\RequirePackage{expl3}
+\ProvidesExplPackage{plpatch3}{2023-02-18}{1.0}
+  {pTeX/upTeX-specific patches to expl3}
+%</package>
+%    \end{macrocode}
+%
+%    \begin{macrocode}
+%<*code|package>
 %    \end{macrocode}
 %
 %
@@ -668,7 +677,7 @@
 %    \end{macrocode}
 %
 %    \begin{macrocode}
-%</package>
+%</code|package>
 %    \end{macrocode}
 %
 % \end{implementation}