Hi, Although according to docs texi2any is identical to makeinfo it outputs its name in the first line which the version check in `Info-file-supports-index-cookies' does not account for. The submitted patch allows both makeinfo and texi2any to be in the version string. In GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.2) of 2024-10-27 built on ethel Repository revision: 523aade3ea11c188e30e3889f031d1848129cf82 Repository branch: master Windowing system distributor 'The X.Org Foundation', version 11.0.12101013 System Description: Gentoo Linux Configured using: 'configure --prefix=/home/matsl --with-mailutils --with-native-compilation --with-tree-sitter'