TL2026 restructured tlmgr.pl's BEGIN block (the non-Windows branch is
now an explicit `else {...}` and the statement order changed), so
gentoo-tex-patches-6's fix-perl-include-path-of-tlmgr.patch no longer
applies. This is the same one-line fix against the TL2026 context:
tlmgr installs its Perl modules under /usr/share/tlpkg/TeXLive/ but
resolves @INC relative to $Master = "$Master/../.." which lands at
/usr/share/texmf-dist/tlpkg, not /usr/share/tlpkg. Add one more `..`.

Bug: https://bugs.gentoo.org/832139
Bug: https://bugs.gentoo.org/263194

--- a/texk/texlive/linked_scripts/texlive/tlmgr.pl
+++ b/texk/texlive/linked_scripts/texlive/tlmgr.pl
@@ -58,7 +58,7 @@
   } else {
     $Master =~ s,/*[^/]*$,,;
     $bindir = $Master;
-    $Master = "$Master/../..";
+    $Master = "$Master/../../..";
     $kpsewhichname = "kpsewhich";
     $ENV{"PATH"} = "$bindir:$ENV{PATH}";
   }