diff --git a/.github/workflows/nodes.yml b/.github/workflows/nodes.yml
index 40ada168..d1b565f1 100644
--- a/.github/workflows/nodes.yml
+++ b/.github/workflows/nodes.yml
@@ -3,6 +3,68 @@ env:
   CI_CONFIG: ./ci/nodes.nix
   CI_PLATFORM: gh-actions
 jobs:
+  chen:
+    name: nodes-chen
+    runs-on: ubuntu-latest
+    steps:
+    - id: checkout
+      name: git clone
+      uses: actions/checkout@v1
+      with:
+        submodules: false
+    - id: nix-install
+      name: nix install
+      uses: arcnmx/ci/actions/nix/install@master
+    - id: ci-setup
+      name: nix setup
+      uses: arcnmx/ci/actions/nix/run@master
+      with:
+        attrs: ci.job.chen.run.bootstrap
+        quiet: false
+    - id: architectures
+      name: prepare for emulated builds
+      run: 'sudo $(which archbinfmt)
+
+        '
+    - id: ci-dirty
+      name: nix test dirty
+      uses: arcnmx/ci/actions/nix/run@master
+      with:
+        attrs: ci.job.chen.run.test
+        command: ci-build-dirty
+        quiet: false
+        stdout: ${{ runner.temp }}/ci.build.dirty
+    - id: ci-test
+      name: nix test build
+      uses: arcnmx/ci/actions/nix/run@master
+      with:
+        attrs: ci.job.chen.run.test
+        command: ci-build-realise
+        ignore-exit-code: true
+        quiet: false
+        stdin: ${{ runner.temp }}/ci.build.dirty
+    - env:
+        CI_EXIT_CODE: ${{ steps.ci-test.outputs.exit-code }}
+      id: ci-summary
+      name: nix test results
+      uses: arcnmx/ci/actions/nix/run@master
+      with:
+        attrs: ci.job.chen.run.test
+        command: ci-build-summarise
+        quiet: false
+        stdin: ${{ runner.temp }}/ci.build.dirty
+        stdout: ${{ runner.temp }}/ci.build.cache
+    - env:
+        CACHIX_SIGNING_KEY: ${{ secrets.CACHIX_SIGNING_KEY }}
+      id: ci-cache
+      if: always()
+      name: nix test cache
+      uses: arcnmx/ci/actions/nix/run@master
+      with:
+        attrs: ci.job.chen.run.test
+        command: ci-build-cache
+        quiet: false
+        stdin: ${{ runner.temp }}/ci.build.cache
   ci-check:
     name: nodes check
     runs-on: ubuntu-latest
diff --git a/config/hosts/chen.nix b/config/hosts/chen.nix
new file mode 100644
index 00000000..5db48fbf
--- /dev/null
+++ b/config/hosts/chen.nix
@@ -0,0 +1,99 @@
+{ meta, config, pkgs, lib, ... }:
+
+with lib;
+
+{
+  # Imports
+
+  imports = with meta; [
+    profiles.hardware.eeepc-1015pem
+    profiles.network
+    services.kattv2
+    services.dnscrypt-proxy
+  ];
+
+  # Terraform
+
+  deploy.tf = {
+    resources.chen = {
+      provider = "null";
+      type = "resource";
+      connection = {
+        port = head config.services.openssh.ports;
+        host = config.network.addresses.private.nixos.ipv4.address;
+      };
+    };
+  };
+
+  # File Systems and Swap
+
+  fileSystems."/" =
+    { device = "/dev/disk/by-uuid/fa06ba90-ffc9-4ca6-b1cf-1205340a975e";
+      fsType = "ext4";
+    };
+
+  fileSystems."/boot" =
+    { device = "/dev/disk/by-uuid/BF39-2AA3";
+      fsType = "vfat";
+    };
+
+  swapDevices =
+    [ { device = "/dev/disk/by-uuid/9c88235e-9705-4b80-a988-e95eda06124f"; }
+    ];
+
+  # Bootloader
+
+  boot = {
+    initrd = {
+      availableKernelModules = [ "xhci_pci" "usb_storage" "sd_mod" "sdhci_acpi" ];
+    };
+    loader = {
+      systemd-boot.enable = true;
+      efi.canTouchEfiVariables = true;
+    };
+  };
+
+  # Hardware
+
+  services.logind.lidSwitchExternalPower = "ignore";
+
+  # Networking
+
+  networking = {
+    hostId = "9f89b327";
+    useDHCP = false;
+    wireless = {
+      enable = false;
+      userControlled.enable = false;
+      interfaces = singleton "wlp1s0";
+    };
+    interfaces.enp0s20u2c2.ipv4.addresses = singleton {
+      inherit (config.network.addresses.private.nixos.ipv4) address;
+      prefixLength = 24;
+    };
+    defaultGateway = config.network.privateGateway;
+  };
+
+  network = {
+    addresses = {
+      private = {
+        enable = true;
+        nixos = {
+          ipv4.address = "192.168.1.34";
+        };
+      };
+    };
+  };
+
+  # Firewall
+
+  network.firewall = {
+    public = {
+      interfaces = singleton "enp0s20u2c2";
+    };
+  };
+
+  # State
+
+  system.stateVersion = "20.09";
+}
diff --git a/config/hosts/goliath.nix b/config/hosts/goliath.nix
index 5b947804..f1a91b7b 100644
--- a/config/hosts/goliath.nix
+++ b/config/hosts/goliath.nix
@@ -108,6 +108,7 @@
           ".local/share/task"
           ".local/share/dino"
           ".local/share/weechat"
+          ".local/share/TelegramDesktop"
           ".local/share/Mumble"
           ".local/share/direnv"
           ".config/Mumble"
diff --git a/config/hosts/yukari.nix b/config/hosts/yukari.nix
index bbf4d0c7..11028442 100644
--- a/config/hosts/yukari.nix
+++ b/config/hosts/yukari.nix
@@ -4,9 +4,9 @@
     profiles.network
     profiles.gui
     users.kat.guiFull
-    services.fusionpbx
     services.jellyfin
     services.kattv-ingest
+    services.kattv2-ingest
     services.postgres
     services.nfs
     services.nginx
diff --git a/config/services/kattv2-ingest.nix b/config/services/kattv2-ingest.nix
new file mode 100644
index 00000000..be3e5975
--- /dev/null
+++ b/config/services/kattv2-ingest.nix
@@ -0,0 +1,124 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  env = {
+    FREI0R_PATH = "${pkgs.frei0r}/lib/frei0r-1";
+    GST_PLUGIN_SYSTEM_PATH_1_0 = with pkgs.gst_all_1; lib.makeSearchPath "lib/gstreamer-1.0" [
+      gstreamer
+      gst-plugins-base
+      gst-plugins-good
+      gst-plugins-bad
+      gst-plugins-ugly
+    ];
+  };
+  queue_frame = {
+    element."queue" = {
+      leaky = "downstream";
+      flush-on-eos = true;
+      max-size-buffers = 3;
+    };
+  };
+  queue_data = {
+    element.queue = {
+      leaky = "downstream";
+    };
+  };
+  videoconvert_cpu = {
+    element.videoconvert = {
+      n-threads = 4;
+      dither = 0;
+      chroma-resampler = 0;
+      chroma-mode = 3;
+    };
+  };
+  videoconvert_gpu = [
+    "glupload"
+    "glcolorconvert"
+    "gldownload"
+  ];
+  encodeopts = {
+    speed-preset = "ultrafast";
+    tune = "zerolatency";
+    pass = "qual";
+    #psy-tune = "film";
+    #noise-reduction=0;
+    quantizer = 27;
+    bitrate = 8192;
+    rc-lookahead = 6;
+  };
+  denoise = {
+    element.frei0r-filter-hqdn3d = {
+      spatial = 0.175; #0.325;
+      temporal = 0.06; #0.11;
+    };
+  };
+  encode_high = [
+    {
+      element.x264enc = {
+        key-int-max = 150;
+      } // encodeopts;
+    }
+    {
+      caps."video/x-h264" = {
+        profile = "high";
+      };
+    }
+    "h264parse"
+  ];
+  rtmpsink = [
+    queue_data
+    "flvmux"
+    {
+      element.rtmp2sink = {
+        location = "rtmp://localhost:1935/stream/kattv2";
+      };
+    }
+  ];
+  pipeline = [
+    {
+      element.fdsrc = {
+        fd = 3;
+      };
+    }
+    "matroskademux"
+    "jpegdec"
+    queue_frame
+
+    videoconvert_cpu
+    denoise
+
+    videoconvert_cpu
+    encode_high
+
+    rtmpsink
+  ];
+in
+{
+  network.firewall = {
+    private.tcp.ports = singleton 1935;
+    public.tcp.ports = [ 4954 1935 ];
+  };
+
+  systemd.sockets.kattv2 = {
+    wantedBy = [ "sockets.target" ];
+    listenStreams = [ "0.0.0.0:4954" ];
+    socketConfig = {
+      Accept = true;
+      Backlog = 0;
+      MaxConnections = 1;
+    };
+  };
+
+  systemd.services."kattv2@" = {
+    environment = env;
+    script = "exec ${pkgs.gst_all_1.gstreamer.dev}/bin/gst-launch-1.0 -e --no-position ${pkgs.lib.gst.pipelineShellString pipeline}";
+    after = [ "nginx.service" ];
+    description = "RTMP stream of kat cam";
+    serviceConfig = {
+      Restart = "on-failure";
+      RestartSec = "10s";
+    };
+  };
+}
diff --git a/config/services/kattv2.nix b/config/services/kattv2.nix
new file mode 100644
index 00000000..f956ac1c
--- /dev/null
+++ b/config/services/kattv2.nix
@@ -0,0 +1,62 @@
+{ meta, config, pkgs, lib, ... }:
+
+let
+  env = {
+    FREI0R_PATH = "${pkgs.frei0r}/lib/frei0r-1";
+    GST_PLUGIN_SYSTEM_PATH_1_0 = with pkgs.gst_all_1; lib.makeSearchPath "lib/gstreamer-1.0" [
+      gstreamer
+      gst-plugins-base
+      gst-plugins-good
+      gst-plugins-bad
+      gst-plugins-ugly
+      pkgs.gst-jpegtrunc
+    ];
+  };
+  cameracapture = {
+    element."v4l2src" = {
+      device = "/dev/videomew";
+      saturation = 100;
+      brightness = 100;
+      extra-controls = "c,exposure_auto=3";
+    };
+  };
+  v4l2src = [
+    cameracapture
+    {
+      caps."image/jpeg" = {
+        width = 1280;
+        height = 720;
+        framerate = "30/1"; # "10/1"
+      };
+    }
+  ];
+  pipeline = v4l2src ++ [
+    "jpegtrunc"
+    { element.matroskamux.streamable = true; }
+    {
+      element.tcpclientsink = {
+        host = meta.network.nodes.yukari.network.addresses.private.nixos.ipv4.address;
+        port = "4954";
+        sync = false;
+      };
+    }
+  ];
+in
+{
+  services.udev.extraRules = ''
+    KERNEL=="video[0-9]*", SUBSYSTEM=="video4linux", SUBSYSTEMS=="usb", ATTR{index}=="0", ATTRS{idVendor}=="045e", ATTRS{idProduct}=="075d", SYMLINK+="videomew", TAG+="systemd"
+  '';
+
+  systemd.services.kattv = {
+    wantedBy = [ "dev-videomew.device" "multi-user.target" ];
+    after = [ "dev-videomew.device" "nginx.service" ];
+    description = "RTMP stream of kat cam";
+    bindsTo = [ "dev-videomew.device" ];
+    environment = env;
+    script = "exec ${pkgs.gst_all_1.gstreamer.dev}/bin/gst-launch-1.0 -e --no-position ${pkgs.lib.gst.pipelineShellString pipeline}";
+    serviceConfig = {
+      Restart = "on-failure";
+      RestartSec = "10s";
+    };
+  };
+}
diff --git a/config/users/kat/dev/emacs.nix b/config/users/kat/dev/emacs.nix
index 86a627ea..5b3923e0 100644
--- a/config/users/kat/dev/emacs.nix
+++ b/config/users/kat/dev/emacs.nix
@@ -15,7 +15,7 @@ let
     };
   };
 in
-optionalAttrs (builtins.getEnv "CI_PLATFORM" == "impure") {
+optionalAttrs (builtins.getEnv "CI_PLATFORM" == "impure" && "mew" != "mew") {
     home.packages = [ doom-emacs pkgs.sqlite ];
 
     home.file.".emacs.d/init.el".text = ''
diff --git a/config/users/kat/gui/packages.nix b/config/users/kat/gui/packages.nix
index 4b090649..ad7d30be 100644
--- a/config/users/kat/gui/packages.nix
+++ b/config/users/kat/gui/packages.nix
@@ -12,6 +12,7 @@
     thunderbird
     mumble-develop
     dino-omemo
+    tdesktop
     transmission-remote-gtk
     scrcpy
     lm_sensors
diff --git a/nix/sources.json b/nix/sources.json
index 6a9ee053..b83c8e67 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -17,10 +17,10 @@
         "homepage": null,
         "owner": "arcnmx",
         "repo": "nixexprs",
-        "rev": "d5db6849309f4df2f94e53a4a4849f3a28c2b4d7",
-        "sha256": "0lrfbnrwwxfwzykmb6m0qghwrxhkjvj5xvkk4aq4rjw847h65x2a",
+        "rev": "c0db6a48e8832e8861c4e47b583266d63e67e5ea",
+        "sha256": "1k3kp6r61r0xz997n27zb6cslffwcm47fgi241608zklpjrdafhn",
         "type": "tarball",
-        "url": "https://github.com/arcnmx/nixexprs/archive/d5db6849309f4df2f94e53a4a4849f3a28c2b4d7.tar.gz",
+        "url": "https://github.com/arcnmx/nixexprs/archive/c0db6a48e8832e8861c4e47b583266d63e67e5ea.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "ci": {
@@ -29,10 +29,10 @@
         "homepage": "https://arcnmx.github.io/ci",
         "owner": "arcnmx",
         "repo": "ci",
-        "rev": "931dc1fd77ebf09dd8d5ee2a6b92762a823e129f",
-        "sha256": "1w59hdsyv1zi49dgi853bn90qwailzywmrrj54k3wm8lcn22prxk",
+        "rev": "215a89f353c2f1fe767d97a99c09a0e46a21edda",
+        "sha256": "12s2iyfmnr9sd31n8xyglqybn5s9808r7n4k8v7nkk7rgh594jz9",
         "type": "tarball",
-        "url": "https://github.com/arcnmx/ci/archive/931dc1fd77ebf09dd8d5ee2a6b92762a823e129f.tar.gz",
+        "url": "https://github.com/arcnmx/ci/archive/215a89f353c2f1fe767d97a99c09a0e46a21edda.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "emacs-overlay": {
@@ -41,10 +41,10 @@
         "homepage": "",
         "owner": "nix-community",
         "repo": "emacs-overlay",
-        "rev": "aa581fc7bce89b3abc60124de8dcc3b7c7a9277c",
-        "sha256": "160v5hsswcvyai1hc6r0gs00z9gm30qgqlgy0sk1x8iwcqslx3wz",
+        "rev": "4ce4c7f01e4d8d481564457c881263cc0cf38805",
+        "sha256": "0csm5nhcnghdx5vbb0f470012z2z8a5n2zg3pkx0p1ikqpai34cf",
         "type": "tarball",
-        "url": "https://github.com/nix-community/emacs-overlay/archive/aa581fc7bce89b3abc60124de8dcc3b7c7a9277c.tar.gz",
+        "url": "https://github.com/nix-community/emacs-overlay/archive/4ce4c7f01e4d8d481564457c881263cc0cf38805.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "hexchen": {
@@ -65,10 +65,10 @@
         "homepage": "https://nix-community.github.io/home-manager/",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "309808afbc2a07e340067f66029a4202b4c4b959",
-        "sha256": "0gwk6xgfajw31v3q2hzzr34yizssc75r87jg4vyvx0amdk4isbdm",
+        "rev": "70c5b268e10025c70823767f4fb49e240b40151d",
+        "sha256": "09si7wq89qpyzfxgs1862s7lv8sl0ikwx7cy9vavf1hd5y6m13s4",
         "type": "tarball",
-        "url": "https://github.com/nix-community/home-manager/archive/309808afbc2a07e340067f66029a4202b4c4b959.tar.gz",
+        "url": "https://github.com/nix-community/home-manager/archive/70c5b268e10025c70823767f4fb49e240b40151d.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "impermanence": {
@@ -77,10 +77,10 @@
         "homepage": "",
         "owner": "nix-community",
         "repo": "impermanence",
-        "rev": "58558845bc68dcf2bb32caa80564f7fe3f6cbc61",
-        "sha256": "10z3g4knkvq838zbfq71pkfyl8cffrpavna448wf5mjscycp0gnv",
+        "rev": "ce77ed9bd069e57a7a688d360196e576ca63a842",
+        "sha256": "1snlcs99vfz3di3vxj1lxnjsl82aimcyv1irs029gzwrsxzpq9gj",
         "type": "tarball",
-        "url": "https://github.com/nix-community/impermanence/archive/58558845bc68dcf2bb32caa80564f7fe3f6cbc61.tar.gz",
+        "url": "https://github.com/nix-community/impermanence/archive/ce77ed9bd069e57a7a688d360196e576ca63a842.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "katexprs": {
@@ -89,10 +89,10 @@
         "homepage": null,
         "owner": "kittywitch",
         "repo": "nixexprs",
-        "rev": "33418f835c61697569feb9d8753134f7c4143d5a",
-        "sha256": "023wma4xv5pshjfdvv9r67nbzwryh0m38vprnnf7ikl1g29a53wi",
+        "rev": "65c3e43c7da5bd6d389a3edfc73b5295a815e8f8",
+        "sha256": "14qpsrlkxnsmm0ssz9k2qwp4h4fxa4wjxkc9mmmkxrai84b1n6mv",
         "type": "tarball",
-        "url": "https://github.com/kittywitch/nixexprs/archive/33418f835c61697569feb9d8753134f7c4143d5a.tar.gz",
+        "url": "https://github.com/kittywitch/nixexprs/archive/65c3e43c7da5bd6d389a3edfc73b5295a815e8f8.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "niv": {
@@ -113,10 +113,10 @@
         "homepage": "",
         "owner": "kirelagin",
         "repo": "nix-dns",
-        "rev": "d47378a4272ca826d770bb22242e5fbb814063b5",
-        "sha256": "19jb4xgi7v1hp5q2cs0v76n316imis1ijd6ag4v8ikgysmrnkliy",
+        "rev": "c7b9645da9c0ddce4f9de4ef27ec01bb8108039a",
+        "sha256": "1b95dh15zl0qaf9fvvvvqlambm3plndpy24wwlib0sy4d0zq6y0h",
         "type": "tarball",
-        "url": "https://github.com/kirelagin/nix-dns/archive/d47378a4272ca826d770bb22242e5fbb814063b5.tar.gz",
+        "url": "https://github.com/kirelagin/nix-dns/archive/c7b9645da9c0ddce4f9de4ef27ec01bb8108039a.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nix-doom-emacs": {
@@ -147,10 +147,10 @@
         "homepage": "",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "2cf9db0e3d45b9d00f16f2836cb1297bcadc475e",
-        "sha256": "0sij1a5hlbigwcgx10dkw6mdbjva40wzz4scn0wchv7yyi9ph48l",
+        "rev": "b67e752c29f18a0ca5534a07661366d6a2c2e649",
+        "sha256": "1n47f7r8cm9pcsz7vl4nxjfvs0fgzvcmjda5h0inz3yx9vghp5xm",
         "type": "tarball",
-        "url": "https://github.com/nixos/nixpkgs/archive/2cf9db0e3d45b9d00f16f2836cb1297bcadc475e.tar.gz",
+        "url": "https://github.com/nixos/nixpkgs/archive/b67e752c29f18a0ca5534a07661366d6a2c2e649.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nur": {
@@ -159,10 +159,10 @@
         "homepage": "https://nur.nix-community.org/",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "06aecedb3f99c7252e6054d22f30558ab3873657",
-        "sha256": "072n6axsz17plkkpb0m43xhsr47xcdsghn98n7n55dpmya2h9j5j",
+        "rev": "041951902d612ce0e0c5a217df529fb05e555ca2",
+        "sha256": "0vmd0zh8jh5r9csphs60mpjv8afa2bjv0z1sy5qnavnwdns7icd6",
         "type": "tarball",
-        "url": "https://github.com/nix-community/NUR/archive/06aecedb3f99c7252e6054d22f30558ab3873657.tar.gz",
+        "url": "https://github.com/nix-community/NUR/archive/041951902d612ce0e0c5a217df529fb05e555ca2.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "tf-nix": {
diff --git a/overlays/exprs b/overlays/exprs
index fc6a3439..65c3e43c 160000
--- a/overlays/exprs
+++ b/overlays/exprs
@@ -1 +1 @@
-Subproject commit fc6a343976f4afa61850484ac2ace2202f7b9576
+Subproject commit 65c3e43c7da5bd6d389a3edfc73b5295a815e8f8