anchor.diff:    proglodyte-wasm = throw "proglodyte-wasm has been removed from nixpkgs, because it is unmaintained since 5 years with zero github stars"; # Added 2021-06-30
     proj_5 = throw "Proj-5 has been removed from nixpkgs, use proj instead"; # Added 2021-04-12
     prometheus-cups-exporter = throw "outdated and broken by design; removed by developer"; # Added 2021-03-16
  +  prometheus-mesos-exporter = throw "prometheus-mesos-exporter is deprecated and archived by upstream"; # Added 2022-04-05
     proxytunnel = throw "proxytunnel has been removed from nixpkgs, because it has not been update upstream since it was added to nixpkgs in 2008 and has therefore bitrotted."; # added 2021-12-15
     pulseaudioLight = throw "'pulseaudioLight' has been renamed to/replaced by 'pulseaudio'"; # Converted to throw 2022-02-22
     pulseeffects = throw "Use pulseeffects-legacy if you use PulseAudio and easyeffects if you use PipeWire"; # Added 2021-02-13
  
positive.code:   tahoelafs = throw "'tahoelafs' has been renamed to/replaced by 'tahoe-lafs'"; # Converted to throw 2022-02-22
    tangogps = foxtrotgps; # Added 2020-01-26
    tdm = throw "tdm has been removed because nobody can figure out how to fix OpenAL integration. Use precompiled binary and `steam-run` instead";
    telepathy-qt = throw "telepathy-qt no longer supports Qt 4. Please use libsForQt5.telepathy instead"; # Added 2020-07-02
    telepathy_farstream = throw "'telepathy_farstream' has been renamed to/replaced by 'telepathy-farstream'"; # Converted to throw 2022-02-22
    telepathy_gabble = throw "'telepathy_gabble' has been renamed to/replaced by 'telepathy-gabble'"; # Converted to throw 2022-02-22
  
negative.code:   kramdown-rfc2629 = rubyPackages.kramdown-rfc2629; # Added 2021-03-23
    krename-qt5 = throw "'krename-qt5' has been renamed to/replaced by 'krename'"; # Converted to throw 2022-02-22
    krita-beta = krita; # moved from top-level 2021-12-23
    kube-aws = throw "kube-aws is deprecated and archived by upstream"; # Added 2022-04-05
    kubeless = throw "kubeless is deprecated and archived by upstream"; # Added 2022-04-05
    kvm = throw "'kvm' has been renamed to/replaced by 'qemu_kvm'"; # Converted to throw 2022-02-22
  
    ### L ###
  