Actually it's debatable whether flex "new" is maintained. For your amusement:
https://invisible-island.net/personal/lint-tools.html#proc_cleanup_lexyacc ----- Original Message ----- | From: "Tommi Vainikainen" <tvain...@debian.org> | To: "submit" <sub...@bugs.debian.org> | Sent: Saturday, July 20, 2019 12:28:20 PM | Subject: Bug#932560: vile: Don't build against flex-old | Source: vile | Severity: normal | | Hi, as a maintainer of flex-old package I'm considering requesting | removing it as obsolete and unmaintained version of flex. Your | package Build-Depends on flex-old. Please update the package build | procedures to build e.g. with current flex (from package `flex`) | instead of flex-old. -- Thomas E. Dickey <dic...@invisible-island.net> http://invisible-island.net ftp://ftp.invisible-island.net
