diff --git a/lib/LaTeXML/Package/expl3.sty.ltxml b/lib/LaTeXML/Package/expl3.sty.ltxml
index f33ca1532..83c36f3c5 100644
--- a/lib/LaTeXML/Package/expl3.sty.ltxml
+++ b/lib/LaTeXML/Package/expl3.sty.ltxml
@@ -1,6 +1,6 @@
 # -*- mode: Perl -*-
 # /=====================================================================\ #
-# |  lipsum                                                             | #
+# |  expl3                                                              | #
 # | Implementation for LaTeXML                                          | #
 # |=====================================================================| #
 # | Part of LaTeXML:                                                    | #
@@ -15,40 +15,8 @@ use strict;
 use warnings;
 use LaTeXML::Package;
 
-LoadPool('expl3');
-InputDefinitions('expl3', type => 'sty', noltxml => 1);
-
-# Redefine aux macro to avoid reliance on argument ordering artefacts in latex.ltx
-# The purpose here was originally to set `\g_file_curr_name_str`,
-#  but I am unsure if it is used anywhere currently?
-DefMacroI('\@pushfilenameaux',          undef, Tokens(), locked => 1);
-DefMacroI('\@expl@push@filename@aux@@', undef, Tokens(), locked => 1);
+InputDefinitions('expl3', type => 'lua');
 
-DefMacroI(T_CS('\__expl_status_pop:w'), '{}', sub {
-    my ($gullet, $arg1) = @_;
-    my @arg_until;
-    # Custom readUntil that can match either \q_stop or \s__expl_stop
-    my $want1 = T_CS('\q_stop');
-    my $want2 = T_CS('\s__expl_stop');
-    my $token;
-    my $nbraces = 0;
-    while (($token = shift(@{ $$gullet{pushback} }) || $$gullet{mouth}->readToken())
-      && !$token->equals($want1) && !$token->equals($want2)) {
-      push(@arg_until, $token);
-      if ($$token[1] == CC_BEGIN) {    # And if it's a BEGIN, copy till balanced END
-        $nbraces++;
-        push(@arg_until, $gullet->readBalanced, T_END); } }
-    # Notice that IFF the arg looks like {balanced}, the outer braces are stripped
-    # so that delimited arguments behave more similarly to simple, undelimited arguments.
-    if (($nbraces == 1) && ($arg_until[0][1] == CC_BEGIN) && ($arg_until[-1][1] == CC_END)) {
-      shift(@arg_until); pop(@arg_until); }
-
-    return (
-      T_CS('\tl_set:Nn'),
-      T_CS('\l__expl_status_stack_tl'), T_BEGIN,                @arg_until, T_END,
-      T_CS('\int_if_odd:nTF'),          T_BEGIN,                $arg1,      T_END,
-      T_BEGIN,                          T_CS('\ExplSyntaxOn'),  T_END,
-      T_BEGIN,                          T_CS('\ExplSyntaxOff'), T_END); },
-  protected => 1, locked => 1);
+InputDefinitions('expl3', type => 'sty', noltxml => 1);
 
 1;