anchor.diff:    # floating point textures patents are expired,
     # so package reduced to alias
     mesa_drivers = mesa.drivers;
  -  mesa_noglu = mesa; # Added 2019-05-28
  +  mesa_noglu = throw "'mesa_noglu' has been renamed to/replaced by 'mesa'"; # Converted to throw 2022-02-22
   
     mpv-with-scripts = self.wrapMpv self.mpv-unwrapped { }; # Added 2020-05-22
  -  mssys = ms-sys; # Added 2015-12-13
  -  multipath_tools = multipath-tools; # Added 2016-01-21
  +  mssys = throw "'mssys' has been renamed to/replaced by 'ms-sys'"; # Converted to throw 2022-02-22
  +  multipath_tools = throw "'multipath_tools' has been renamed to/replaced by 'multipath-tools'"; # Converted to throw 2022-02-22
     mumsi = throw "mumsi has been removed from nixpkgs, as it's unmaintained and does not build anymore"; # Added 2021-11-18
  -  mupen64plus1_5 = mupen64plus; # Added 2016-02-12
  +  mupen64plus1_5 = throw "'mupen64plus1_5' has been renamed to/replaced by 'mupen64plus'"; # Converted to throw 2022-02-22
     mx = throw "graalvm8 and its tools were deprecated in favor of graalvm8-ce"; # Added 2021-10-15
     mxisd = throw "mxisd has been removed from nixpkgs as it has reached end of life, see https://github.com/kamax-matrix/mxisd/blob/535e0a5b96ab63cb0ddef90f6f42c5866407df95/EOL.md#end-of-life-notice . ma1sd may be a suitable alternative."; # Added 2021-04-15
  -  mysqlWorkbench = mysql-workbench; # Added 2017-01-19
  +  mysqlWorkbench = throw "'mysqlWorkbench' has been renamed to/replaced by 'mysql-workbench'"; # Converted to throw 2022-02-22
   
     ### N ###
   
     net_snmp = net-snmp; # Added 2019-12-21
     nagiosPluginsOfficial = monitoring-plugins;
     navit = throw "navit has been removed from nixpkgs, due to being unmaintained"; # Added 2021-06-07
  -  ncat = nmap; # Added 2016-01-26
  +  ncat = throw "'ncat' has been renamed to/replaced by 'nmap'"; # Converted to throw 2022-02-22
     neap = throw "neap was removed from nixpkgs, as it relies on python2"; # Added 2022-01-12
  -  netcat-openbsd = libressl.nc; # Added 2018-04-25
  +  netcat-openbsd = throw "'netcat-openbsd' has been renamed to/replaced by 'libressl.nc'"; # Converted to throw 2022-02-22
     netease-cloud-music = throw "netease-cloud-music has been removed together with deepin"; # Added 2020-08-31
  -  networkmanager_fortisslvpn = networkmanager-fortisslvpn; # Added 2018-02-25
  -  networkmanager_iodine = networkmanager-iodine; # Added 2018-02-25
  -  networkmanager_l2tp = networkmanager-l2tp; # Added 2018-02-25
  -  networkmanager_openconnect = networkmanager-openconnect; # Added 2018-02-25
  -  networkmanager_openvpn = networkmanager-openvpn; # Added 2018-02-25
  -  networkmanager_vpnc = networkmanager-vpnc; # Added 2018-02-25
  +  networkmanager_fortisslvpn = throw "'networkmanager_fortisslvpn' has been renamed to/replaced by 'networkmanager-fortisslvpn'"; # Converted to throw 2022-02-22
  +  networkmanager_iodine = throw "'networkmanager_iodine' has been renamed to/replaced by 'networkmanager-iodine'"; # Converted to throw 2022-02-22
  +  networkmanager_l2tp = throw "'networkmanager_l2tp' has been renamed to/replaced by 'networkmanager-l2tp'"; # Converted to throw 2022-02-22
  +  networkmanager_openconnect = throw "'networkmanager_openconnect' has been renamed to/replaced by 'networkmanager-openconnect'"; # Converted to throw 2022-02-22
  +  networkmanager_openvpn = throw "'networkmanager_openvpn' has been renamed to/replaced by 'networkmanager-openvpn'"; # Converted to throw 2022-02-22
  +  networkmanager_vpnc = throw "'networkmanager_vpnc' has been renamed to/replaced by 'networkmanager-vpnc'"; # Converted to throw 2022-02-22
     neutral-style = throw "neural-style has been removed, as the upstream project has been abandoned"; # Added 2020-03-28
  -  nfsUtils = nfs-utils; # Added 2014-12-06
  -  nginxUnstable = nginxMainline; # Added 2018-04-25
  -  nilfs_utils = nilfs-utils; # Added 2018-04-25
  +  nfsUtils = throw "'nfsUtils' has been renamed to/replaced by 'nfs-utils'"; # Converted to throw 2022-02-22
  +  nginxUnstable = throw "'nginxUnstable' has been renamed to/replaced by 'nginxMainline'"; # Converted to throw 2022-02-22
  +  nilfs_utils = throw "'nilfs_utils' has been renamed to/replaced by 'nilfs-utils'"; # Converted to throw 2022-02-22
     nix-direnv-flakes = nix-direnv;
     nix-review = nixpkgs-review; # Added 2019-12-22
     nixFlakes = nixVersions.stable; # Added 2021-05-21
  
positive.code:   urxvt_tabbedex = rxvt-unicode-plugins.tabbedex; # Added 2020-02-02
    urxvt_theme_switch = rxvt-unicode-plugins.theme-switch; # Added 2020-02-02
    urxvt_vtwheel = rxvt-unicode-plugins.vtwheel; # Added 2020-02-02
    usb_modeswitch = usb-modeswitch; # Added 2016-05-10
    usbguard-nox = usbguard; # Added 2019-09-04
    utillinux = util-linux; # Added 2020-11-24
    uzbl = throw "uzbl has been removed from nixpkgs, as it's unmaintained and uses insecure libraries";
  
negative.code:   flvtool2 = throw "flvtool2 has been removed."; # Added 2020-11-03
    fme = throw "fme was removed, because it is old and uses Glade, a discontinued library."; # Added 2022-01-26
    foldingathome = fahclient; # Added 2020-09-03
    font-awesome-ttf = throw "'font-awesome-ttf' has been renamed to/replaced by 'font-awesome'"; # Converted to throw 2022-02-22
  
    fontconfig-ultimate = throw ''
      fontconfig-ultimate has been removed. The repository has been archived upstream and activity has ceased for several years.
  