{
  lib,
  pkgs,
}: let
  everyday = 24 * 60 * 60 * 1000;
  searchTerms = "{searchTerms}";
  nixosIcon = "${pkgs.nixos-icons}/share/icons/hicolor/scalable/apps/nix-snowflake.svg";
  self = {
    disable = engines: lib.genAttrs engines (_: {metaData.hidden = true;});
    disableDefault = self.disable ["google" "Amazon.fr" "bing"];

    nix = {
      inherit (self) "Home Manager Options" "NixOS Options" "NixOS Wiki" "Nix Packages";
    };
    dev = self.nix // {inherit (self) AlternativeTo Phind;};
    personal = {inherit (self) Emojipedia;};
    work = {inherit (self) nLab;};
    all = self.dev // self.personal // self.work // {inherit (self) Searx;};

    Emojipedia = {
      urls = [
        {
          template = "https://emojipedia.org/search/";
          params = [(lib.nameValuePair "q" searchTerms)];
        }
      ];
      icon = "https://emojipedia.org/static/img/favicons/favicon-16x16.png";
      updateInterval = everyday;
      definedAliases = ["@emojipedia" "@emoji" "@em"];
    };

    AlternativeTo = {
      urls = [
        {
          template = "https://alternativeto.net/browse/search/";
          params = [(lib.nameValuePair "q" searchTerms)];
        }
      ];
      icon = "https://alternativeto.net/static/icons/a2/favicon-16x16.png";
      updateInterval = everyday;
      definedAliases = ["@alternativeto" "@a2"];
    };

    "Home Manager Options" = {
      urls = [
        {
          template = "https://home-manager-options.extranix.com/?query={searchTerms}";
        }
      ];
      icon = nixosIcon;
      definedAliases = ["@homemanager" "@hm"];
    };

    "NixOS Options" = {
      urls = [
        {
          template = "https://search.nixos.org/options";
          params = [
            (lib.nameValuePair "channel" "unstable")
            (lib.nameValuePair "query" searchTerms)
          ];
        }
      ];
      icon = nixosIcon;
      definedAliases = ["@nixos" "@no"];
    };

    "NixOS Wiki" = {
      urls = [
        {
          template = "https://wiki.nixos.org/w/index.php";
          params = [(lib.nameValuePair "search" searchTerms)];
        }
      ];
      icon = nixosIcon;
      definedAliases = ["@nixoswiki" "@nw"];
    };

    "Nix Packages" = {
      urls = [
        {
          template = "https://search.nixos.org/packages";
          params = [
            (lib.nameValuePair "channel" "unstable")
            (lib.nameValuePair "query" searchTerms)
          ];
        }
      ];
      icon = nixosIcon;
      definedAliases = ["@nixpkgs" "@np"];
    };

    nLab = {
      urls = [
        {
          template = "https://ncatlab.org/nlab/search";
          params = [(lib.nameValuePair "query" searchTerms)];
        }
      ];
      icon = "https://ncatlab.org/favicon.ico";
      updateInterval = everyday;
      definedAliases = ["@ncatlab" "@nlab"];
    };

    Searx = {
      urls = [
        {
          template = "https://searx.aristote.fr/search";
          params = [(lib.nameValuePair "q" searchTerms)];
        }
      ];
      icon = "https://searx.aristote.fr/static/themes/simple/img/favicon.svg";
      updateInterval = everyday;
    };

    Phind = {
      urls = [
        {
          template = "https://phind.com/search";
          params = [(lib.nameValuePair "q" searchTerms)];
        }
      ];
      icon = "https://www.phind.com/images/favicon.png";
      updateInterval = everyday;
      definedAliases = ["@phind" "@ph"];
    };
  };
in
  self