Slack blocking on work computer - website blocking

The blocking step is now working, if I start blocky manually.

The next problem is that , getting configuration.nix to generate the correct yaml config file.

The problem is generating the inline code, under the slack group.

blocking:
  blackLists:
    ads:
    - https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts
    adult:
    - https://blocklistproject.github.io/Lists/porn.txt
    slack:
    - |
      www.youtube.com
      www.facebook.com

The entry in my configuration.nix look like this.

  networking.nameservers = [ "127.0.0.1" ];

  services.blocky = {
    enable = true;
    # enable = false;
    settings = {
      ports.dns = 53; # Port for incoming DNS Queries.
      upstreams.groups.default = [ "84.238.0.130" "84.238.6.254" "192.168.1.1" ];

      # For initially solving DoH/DoT Requests when no system Resolver is available.
      bootstrapDns = {
        upstream = "https://one.one.one.one/dns-query";
        ips = [ "1.1.1.1" "1.0.0.1" ];
      };
      #Enable Blocking of certian domains.
      blocking = {
        blackLists = {
          #Adblocking
          ads = ["https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts"];
          #Another filter for blocking adult sites
          adult = ["https://blocklistproject.github.io/Lists/porn.txt"];
          #You can add additional categories
          slack = [ "www.youtube.com" "www.facebook.com"  ]; 
        };
     
      #Configure what block categories are used
      	clientGroupsBlock = {
        	default = [ "ads" "slack" ];
        	kids-ipad = ["ads" "adult"];
      	};
      };	
    };
  };