anchor.diff:    cinepaint = throw "cinepaint has been removed from nixpkgs, as it was unmaintained"; # Added 2019-12-10
     ckb = throw "'ckb' has been renamed to/replaced by 'ckb-next'"; # Converted to throw 2022-02-22
     callPackage_i686 = pkgsi686Linux.callPackage;
  -  creddump = throw "creddump has been removed from nixpkgs as the upstream has abandoned the project."; # Added 2022-01-01
  +  creddump = throw "creddump has been removed from nixpkgs as the upstream has abandoned the project"; # Added 2022-01-01
   
     # these are for convenience, not for backward compat and shouldn't expire
     clang5Stdenv = lowPrio llvmPackages_5.stdenv;
  
positive.code:   mist = throw "mist has been removed as the upstream project has been abandoned, see https://github.com/ethereum/mist#mist-browser-deprecated"; # Added 2020-08-15
    mlt-qt5 = throw "'mlt-qt5' has been renamed to/replaced by 'libsForQt5.mlt'"; # Converted to throw 2022-02-22
    mobile_broadband_provider_info = throw "'mobile_broadband_provider_info' has been renamed to/replaced by 'mobile-broadband-provider-info'"; # Converted to throw 2022-02-22
    moby = throw "moby has been removed, merged into linuxkit in 2018.  Use linuxkit instead.";
    module_init_tools = throw "'module_init_tools' has been renamed to/replaced by 'kmod'"; # Converted to throw 2022-02-22
    monero = monero-cli; # Added 2021-11-28
    monodevelop = throw "monodevelop has been removed from nixpgks"; # Added 2022-01-15
    mopidy-gmusic = throw "mopidy-gmusic has been removed because Google Play Music was discontinued"; # Added 2021-03-07
    mopidy-local-images = throw "mopidy-local-images has been removed as it's unmaintained. Its functionality has been merged into the mopidy-local extension."; # Added 2020-10-18
    mopidy-local-sqlite = throw "mopidy-local-sqlite has been removed as it's unmaintained. Its functionality has been merged into the mopidy-local extension."; # Added 2020-10-18
  
    morituri = throw "'morituri' has been renamed to/replaced by 'whipper'"; # Converted to throw 2022-02-22
    mozart-binary = mozart2-binary; # Added 2019-09-23
  
negative.code:   zeroc_ice = pkgs.zeroc-ice;
  
    # Added 2020-06-22
    zeromq3 = throw "zeromq3 has been deprecated by zeromq4";
    jzmq = throw "jzmq has been removed from nixpkgs, as it was unmaintained";
  
    avian = throw ''
      The package doesn't compile anymore on NixOS and both development &
      maintenance is abandoned by upstream.
    ''; # Cleanup before 21.11, Added 2021-05-07
    ant-dracula-theme = throw "ant-dracula-theme is now dracula-theme, and theme name is Dracula instead of Ant-Dracula";
    dina-font-pcf = dina-font; # Added 2020-02-09
    dnscrypt-proxy = throw "dnscrypt-proxy has been removed. Please use dnscrypt-proxy2"; # Added 2020-02-02
    gcc-snapshot = throw "gcc-snapshot: Marked as broken for >2 years, additionally this 'snapshot' pointed to a fairly old one from gcc7";
    gnatsd = nats-server; # Added 2019-10-28
  
    obs-gstreamer = throw ''
  