diff --git a/.github/workflows/cachix.yml b/.github/workflows/cachix.yml
index 9f6bead..8a09f5a 100644
--- a/.github/workflows/cachix.yml
+++ b/.github/workflows/cachix.yml
@@ -21,24 +21,6 @@ jobs:
     - name: Build NixOS configuration
       run: nix build .#nixosConfigurations.${{ matrix.host }}.config.system.build.toplevel
 
-  build-packages:
-    strategy:
-      matrix:
-        package: [ ddns ]
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v20
-      with:
-        nix_path: nixpkgs=channel:nixos-unstable
-    - uses: cachix/cachix-action@v12
-      with:
-        name: inclyc
-        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-    # Cherry-picked from https://github.com/TGuimbert/dotfiles/blob/3b9d27ec6e22ab7c70819799876e4eb089678424/.github/workflows/cachix.yaml#L8
-    - name: Build Packages
-      run: nix build .#${{ matrix.package }}
-
   build-home-configurations:
     strategy:
       matrix:
diff --git a/nixos/configurations/adrastea/default.nix b/nixos/configurations/adrastea/default.nix
index 4053d1e..df5af79 100644
--- a/nixos/configurations/adrastea/default.nix
+++ b/nixos/configurations/adrastea/default.nix
@@ -184,26 +184,6 @@
     };
   };
 
-  sops.secrets."ddns/cloudflare" = { };
-  services.ddns."cloudflare" = {
-    ipv4 = "adrastea.lyc.dev";
-    index4 = "shell:curl -4L lug.hit.edu.cn/myip";
-    dns = "cloudflare";
-    extraPath = [ pkgs.curl ];
-    environmentFile = [ config.sops.secrets."ddns/cloudflare".path ];
-    onCalendar = "minutely";
-  };
-
-  sops.secrets."ddns/dnspod" = { };
-  services.ddns."inclyc-cn" = {
-    ipv4 = "ppp.ws.inclyc.cn";
-    index4 = "shell:curl -4L lug.hit.edu.cn/myip";
-    dns = "dnspod";
-    extraPath = [ pkgs.curl ];
-    environmentFile = [ config.sops.secrets."ddns/dnspod".path ];
-    onCalendar = "minutely";
-  };
-
   systemd.extraConfig = ''
     DefaultTimeoutStopSec=10s
   '';
diff --git a/nixos/modules/ddns.nix b/nixos/modules/ddns.nix
deleted file mode 100644
index 6a9d229..0000000
--- a/nixos/modules/ddns.nix
+++ /dev/null
@@ -1,91 +0,0 @@
-{ config
-, lib
-, pkgs
-, ...
-}:
-with lib;
-let
-  cfg = config.services.ddns;
-  ddnsOptions = {
-    options = {
-      ipv4 = mkOption {
-        type = with types; nullOr str;
-        default = null;
-      };
-      ipv6 = mkOption {
-        type = with types; nullOr str;
-        default = null;
-      };
-      index4 = mkOption {
-        type = with types; nullOr str;
-        default = null;
-      };
-      index6 = mkOption {
-        type = with types; nullOr str;
-        default = null;
-      };
-      ttl = mkOption {
-        type = with types; nullOr int;
-        default = null;
-      };
-      proxy = mkOption {
-        type = with types; nullOr str;
-        default = null;
-      };
-      dns = mkOption {
-        type = with types; nullOr str;
-        default = null;
-      };
-      package = mkOption {
-        type = with types; package;
-        default = pkgs.ddns;
-      };
-      extraPath = mkOption {
-        type = with types; listOf package;
-        default = [ ];
-      };
-      environmentFile = mkOption {
-        type = with types; listOf str;
-        default = [ ];
-      };
-      onCalendar = mkOption {
-        type = with types; nullOr str;
-        default = null;
-      };
-    };
-  };
-  mkService = name: ddns: {
-    path = [ ddns.package ] ++ ddns.extraPath;
-    environment = mapAttrs'
-      (name: value: nameValuePair
-        ("DDNS_${toUpper name}")
-        value)
-      (filterAttrs
-        (n: v: (builtins.typeOf v) == "string" && n != "onCalendar")
-        ddns);
-    serviceConfig = {
-      ExecStart = "${ddns.package}/bin/ddns";
-      EnvironmentFile = ddns.environmentFile;
-      DynamicUser = true;
-    };
-  };
-  mkTimer = name: ddns: mkIf (ddns.onCalendar != null) {
-    wantedBy = [ "timers.target" ];
-    timerConfig = {
-      OnCalendar = ddns.onCalendar;
-      Persistent = true;
-    };
-  };
-in
-{
-  options.services.ddns = mkOption {
-    default = { };
-    type = types.attrsOf (types.submodule ddnsOptions);
-  };
-  config = lib.mkIf (cfg != { }) (lib.mkMerge [
-    {
-      systemd.services = mapAttrs' (n: v: nameValuePair "ddns-${n}" (mkService n v)) cfg;
-      systemd.timers = mapAttrs' (n: v: nameValuePair "ddns-${n}" (mkTimer n v)) cfg;
-    }
-  ]);
-}
diff --git a/nixos/modules/default.nix b/nixos/modules/default.nix
index cc47db2..532e8a5 100644
--- a/nixos/modules/default.nix
+++ b/nixos/modules/default.nix
@@ -5,7 +5,6 @@
     inputs.home-manager.nixosModules.home-manager
     ./clash
     ./nix.nix
-    ./ddns.nix
     ./nix-ld.nix
     ./gui.nix
     ./user.nix
diff --git a/pkgs/ddns/default.nix b/pkgs/ddns/default.nix
deleted file mode 100644
index e13e3a0..0000000
--- a/pkgs/ddns/default.nix
+++ /dev/null
@@ -1,17 +0,0 @@
-{ buildPythonApplication
-, fetchPypi
-}:
-buildPythonApplication
-rec {
-  pname = "ddns";
-  version = "2.12.0";
-  name = "${pname}-${version}";
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "A41erAo7KOkgPpE+Izuof+MuUzOORPPraxFoj4/dtk0=";
-  };
-
-  # Ungly hack for https://github.com/NewFuture/DDNS/blob/a1a8f8565c80d9702a49fcb45f18b32dfb4dba26/setup.py#L47
-  # setup a fack "travis" environment, pass package version to skip the check
-  TRAVIS_TAG = version;
-}
diff --git a/pkgs/default.nix b/pkgs/default.nix
index 0f5b83a..9bd6012 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -1,3 +1 @@
-{ pkgs ? (import ../nixpkgs.nix) { } }: {
-  ddns = pkgs.python3.pkgs.callPackage ./ddns { };
-}
+{ pkgs ? (import ../nixpkgs.nix) { } }: { }
diff --git a/secrets/general.yaml b/secrets/general.yaml
index d9ded3a..27f4949 100644
--- a/secrets/general.yaml
+++ b/secrets/general.yaml
@@ -2,9 +2,6 @@ email:
     zoho:
         password: ENC[AES256_GCM,data:AXI9RkSetE7EwoKBSsYyZg==,iv:bUxhvsGkztiNJmDA9XUgklFt4NUDbWjJwqIyJgJxgWU=,tag:DWmoR8UbqGscKpRCyIBmhA==,type:str]
 swyjs-credential: ENC[AES256_GCM,data:QPCz7LrmLasix3uHuftClwVow1aCvg0cHCllnzlVjOmb6PWOgX/+azNaWOos6/P4R9yA62T7T6o4bLF7QHqE1xvPqc7omF63sA0hk7plFfb9rPYmTUWe,iv:MzYgRxfgcr8zKJ9v6myQhUsyI/ZpA7/qbFhqwZabGn8=,tag:+69k5Y4gISPgUY5Byfr0vQ==,type:str]
-ddns:
-    cloudflare: ENC[AES256_GCM,data:l+3DZCGnUVnV0cfCBCHKYM300kGhY0UzOYVOyx1+R9Vo5Rv8kXEqMVVB3F3xvdpBU6x1pw==,iv:Vy9rVyuRSrKtAWva3Nqa/giflgx92BvmGX9omsbPpmk=,tag:kbb9ciKzM5Q1V/bDaxW1DA==,type:str]
-    dnspod: ENC[AES256_GCM,data:NY7CKa/CnYWGGrzQ1rNdFMAo12RBV/QeuqLdsLCS24NHqQUG/3Q11RPoVFXB/xaYCxvkTvFXN4OgBl0=,iv:pb2jT86D6Bm3OT3gC9C0qLh36osQf7hhtBq8UPbxb8Q=,tag:qv5e1t/DL+LbmUE89cAbkg==,type:str]
 clash-provider:
     dler: ENC[AES256_GCM,data:5WapDgbdTNoqpcBS3uH0K/NBx+ZT0nffz8/1/7BypPCFL6da18BY9z2EFMvMukm+e4OjjnBFU0nmNwuOLbwE9kjapDPjqaKEyLtY4DjhUAk=,iv:VuGCzTFGbim9iZmgx4KCGO41T536SABdMrRDtkXYNOs=,tag:y+Wc7tSC39GkzqOa7LcGyg==,type:str]
     mielink: ENC[AES256_GCM,data:H/Ov6NzbWAGH1tRWLzbuvhf4/JNKvCw2Vvm0kblOim5CzeXHyOohHShtTsx7XDbwwz3W4wp7EBv3nnRbV0xeHq8=,iv:t8QzBVDxjy1GEAgiCkGMD2dcEI3RC0hI53yJ1gp2ew4=,tag:rksQaZOp7XhOWNnKhqzmeA==,type:str]
@@ -56,8 +53,8 @@ sops:
             TkVrd2RsNys4SGFZRVozYzdrT2VXVWMK7Ctrg2D1BAMVQqTaxOIw3ylgbI6lYswL
             MD2TkOYFNTRNOyoz4fmoidjDry/yqwdJ03FPPK4z98uVVvVITey83Q==
             -----END AGE ENCRYPTED FILE-----
-    lastmodified: "2023-12-25T09:35:27Z"
-    mac: ENC[AES256_GCM,data:TZgQ3aUS8OmQ5s5YJFgJHAToDq+2a23s/XNcnMYNAWoXudIEGRUuT09pgcC88QtLG5jxpZ5PdplSHgXM8+/yEzHSfLx2JpFoDKg4mYe2niihiqJ3ro7QKTGpdLUor3CjVciBeCCcONI7WkHPOW+EipBpHEWzldo8Uo1hiGmxpTM=,iv:XMW3sRxmDf5aSc4cslWqpTM5ePgaXTfocHLw65q3Bxs=,tag:4cV4+DQnlbBPHduW1H+0qA==,type:str]
+    lastmodified: "2023-12-27T12:49:20Z"
+    mac: ENC[AES256_GCM,data:rU8CKwh9Vg1XsVawa8ZBO0Xuymryk8q7D5Lqp9BWmK7+qJBP8a6W2tUbbOvsc3/pgw5ExWPhfDBQ5j5O5vtwNVzYK4qhF2Jd7IU39aSQL6N4J2dMGiruA+FoHEXl8EKWRevYlkXFMeonDMy23TiBq63KgdKhl1k+NOn9ttf0bOE=,iv:uNnptOSNlgCeR540pqu9M/YtI/h7Intp6CEeORzGnBI=,tag:duOiXWFx0zyCZ/pHyyGcpA==,type:str]
     pgp: []
     unencrypted_suffix: _unencrypted
     version: 3.8.1