anchor.diff:        memcached
         netcat-openbsd nfs-utils nodejs ntp
         openjdk openssh openssl optipng
  -      parallel perl postgresql procps psmisc pv pxz python
  +      parallel perl php postgresql procps psmisc pv pxz python
         renameutils riemann runit rxvt_unicode
         s3cmd shadow sshfsFuse stdenv strace strongswan sysstat systemd
         tcpdump tmux tree tzdata
  
positive.code:       kibana4 kiries
        mariadb mariadb-galera memcached-tool mergex mkebs myrapi
        newrelic-memcached-plugin newrelic-mysql-plugin newrelic-plugin-agent newrelic-sysmond nginx nix
        percona-toolkit php54 pivotal_agent put-metric
        rabbitmq replicator retry
        solr sproxy syslog-ng
        thumbor
  
negative.code:     packageOverrides = pkgs: rec {
        inherit (ugpkgs) imagemagick go docker nix;
        mysql = ugpkgs.mariadb;
        php = ugpkgs.php54;
        s3cmd = pkgs.s3cmd_15_pre_81e3842f7a;
        gnupg = pkgs.gnupg.override { pinentry = null; openldap = null; libusb = null; };
      };
  