nixForLinking: drop alias

pkgs/by-name/nu/nurl/package.nix

···
   makeBinaryWrapper,
   gitMinimal,
   mercurial,
-  nixForLinking,
+  nix,
 }:
 
 rustPlatform.buildRustPackage rec {
···
         lib.makeBinPath [
           gitMinimal
           mercurial
-          nixForLinking
+          nix
         ]
       }
     installManPage artifacts/nurl.1

pkgs/top-level/aliases.nix

···
   ''; # Added 2024-06-25
   nextcloud27Packages = throw "Nextcloud27 is EOL!"; # Added 2024-06-25
   nextcloud-news-updater = throw "nextcloud-news-updater has been removed because the project is unmaintained"; # Added 2025-03-28
+  nixForLinking = throw "nixForLinking has been removed, use `nixVersions.nixComponents_<version>` instead"; # Added 2025-08-14
   nagiosPluginsOfficial = monitoring-plugins;
   neochat = makePlasma5Throw "neochat"; # added 2022-05-10
   nerdfonts = throw ''

pkgs/top-level/all-packages.nix

···
 
   nix = nixVersions.stable;
 
-  # Overlays for CppNix nightly, Lix, or Tvix want to change the default Nix
-  # implementation in Nixpkgs by overriding `pkgs.nix`. However, some packages
-  # link against the internal/unstable CppNix APIs directly, and these packages
-  # will break if built with different versions or implementations of Nix.
-  #
-  # If you want to swap out the Nix implementation in your package set, you
-  # don't want these packages to break. Therefore, some packages will refer to
-  # `nixForLinking` explicitly, at least until these dependencies can be sorted out.
-  nixForLinking = nixVersions.stable;
-
   nixStatic = pkgsStatic.nix;
 
   lixPackageSets = recurseIntoAttrs (