Description of problem:
When attempted to rebuild new bind release including documentation rebuild, my build failed (again) on weird xindy error. Strange is exactly the same version builds fine on f34, but rawhide is broken.

Version-Release number of selected component (if applicable):
texlive-xindy-20210325-37.fc35.x86_64
clisp-2.49.93-21.20210628gitde01f0f.fc35.x86_64

How reproducible:
reliable

Steps to Reproduce:
1. fedpkg clone --anonymous bind && cd bind
2. dnf builddep -y *.spec 
3. fedpkg local --with DOCPDF

Actual results:
...
latexmk -pdf -dvi- -ps-  'Bv9ARM.tex'
Rc files read:
  /etc/latexmk.conf
  latexmkrc
Latexmk: This is Latexmk, John Collins, 29 May 2021, version: 4.74b.
Latexmk: applying rule 'makeindex Bv9ARM.idx'...
Rule 'makeindex Bv9ARM.idx': The following rules & subrules became out-of-date:
      'makeindex Bv9ARM.idx'
------------
Run number 1 of rule 'makeindex Bv9ARM.idx'
------------
------------
Running 'internal xindy -L english -C utf8  -M sphinx.xdy  -o "Bv9ARM.ind" "Bv9ARM.idx"'
------------
Latexmk: calling xindy( -L english -C utf8  -M sphinx.xdy  -o "Bv9ARM.ind" "Bv9ARM.idx" )
/usr/lib64/clisp-2.49.93+/base/lisp.run: initialization file `/usr/bin/xindy.mem' was not created by this version of CLISP runtime
Latexmk: Errors, so I did not complete making targets
Collected error summary (may duplicate other messages):
  makeindex Bv9ARM.idx: Command for 'makeindex Bv9ARM.idx' gave return code 256
      Refer to 'Bv9ARM.ilg' for details
Latexmk: Use the -f option to force complete processing,
 unless error was exceeding maximum runs, or warnings treated as errors.
make: *** [Makefile:29: Bv9ARM.pdf] Error 12


Expected results:
built successfuly, just like on f34

Additional info:
Failed also on my COPR [1]. Failed too during rawhide build [2].

I admit build of documentation in bind is not simplest to debug. It should help just to build, once failed, cd bind-9.16.19/build/doc/arm/_build/latex. Then just make.

1. https://copr.fedorainfracloud.org/coprs/pemensik/bind-9.16/build/2337045/
2. https://koji.fedoraproject.org/koji/taskinfo?taskID=72335853