-`base16-builder` node package has been removed due to lack of upstream maintenance.
-`gentium` package now provides `Gentium-*.ttf` files, and not `GentiumPlus-*.ttf` files like before. The font identifiers `Gentium Plus*` are available in the `gentium-plus` package, and if you want to use the more recently updated package `gentium`[by sil](https://software.sil.org/gentium/), you should update your configuration files to use the `Gentium` font identifier.
-`space-orbit` package has been removed due to lack of upstream maintenance. Debian upstream stopped tracking it in 2011.
-`command-not-found` package is now disabled by default; it works only for nix-channels based systems, and requires setup for it to work.
- Derivations setting both `separateDebugInfo` and one of `allowedReferences`, `allowedRequistes`, `disallowedReferences` or `disallowedRequisites` must now set `__structuredAttrs` to `true`. The effect of reference whitelisting or blacklisting will be disabled on the `debug` output created by `separateDebugInfo`.
- NixOS display manager modules now strictly use tty1, where many of them previously used tty7. Options to configure display managers' VT have been dropped. A configuration with a display manager enabled will not start `getty@tty1.service`, even if the system is forced to boot into `multi-user.target` instead of `graphical.target`.
-`command-not-found` package is now disabled by default; it works only for nix-channels based systems, and requires setup for it to work.
## Other Notable Changes {#sec-release-25.11-notable-changes}
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