anchor.diff:    links = links2; # added 2016-01-31
     linux_rpi0 = linux_rpi1;
     linuxPackages_rpi0 = linuxPackages_rpi1;
  +  loadcaffe = throw "loadcaffe has been removed, as the upstream project has been abandoned"; # added 2020-03-28
     lttngTools = lttng-tools;  # added 2014-07-31
     lttngUst = lttng-ust;  # added 2014-07-31
     lua5_1_sockets = lua51Packages.luasocket; # added 2017-05-02
  
positive.code:   tftp_hpa = tftp-hpa; # added 2015-04-03
    tomcat85 = tomcat8; # added 2020-03-11
    torbrowser = tor-browser-bundle-bin; # added 2017-04-05
    transporter = throw "transporter has been removed. It was archived upstream, so it's considered abandoned.";
    trang = jing-trang; # added 2018-04-25
    transmission_gtk = transmission-gtk; # added 2018-01-06
    transmission_remote_gtk = transmission-remote-gtk; # added 2018-01-06
    truecrypt = veracrypt; # added 2018-10-24
    tshark = wireshark-cli; # added 2018-04-25
    ubootBeagleboneBlack = ubootAmx335xEVM; # added 2020-01-21
  
negative.code:   networkmanager_openconnect = networkmanager-openconnect; # added 2018-02-25
    networkmanager_openvpn = networkmanager-openvpn; # added 2018-02-25
    networkmanager_vpnc = networkmanager-vpnc; # added 2018-02-25
    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
    nix-review = nixpkgs-review; # added 2019-12-22
    nmap_graphical = nmap-graphical;  # added 2017-01-19
    nologin = shadow; # added 2018-04-25
    nxproxy = nx-libs; # added 2019-02-15
  