diff --git a/.github/workflows/cachix.yml b/.github/workflows/cachix.yml
index 602af55..04a17c5 100644
--- a/.github/workflows/cachix.yml
+++ b/.github/workflows/cachix.yml
@@ -18,7 +18,30 @@ jobs:
         with:
           name: lava
           authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-      - run: nix build -L .#linux-lava
+      - run: nix build -L .#linux_lava
+
+  linux_tkg:
+    name: Build Linux-tkg
+    runs-on: ubuntu-latest
+    strategy:
+        matrix:
+            kernelVersion: ["54", "510", "512"]
+            sched: [bmq, cfs, cacule, muqss, pds]
+            include:
+              - kernelVersion: "510"
+                sched: upds
+    steps:
+      - uses: actions/checkout@v2.3.4
+      - uses: cachix/install-nix-action@v13
+        with:
+          install_url: https://github.com/numtide/nix-flakes-installer/releases/download/nix-3.0pre20201007_5257a25/install
+          extra_nix_config: experimental-features = nix-command flakes
+      - uses: cachix/cachix-action@v10
+        with:
+          name: lava
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+      - run: nix build -L .#linux_tkg-${{ matrix.sched }}-${{ matrix.kernelVersion }}
+
   wine:
     name: Build Wine
     runs-on: ubuntu-latest
diff --git a/flake.nix b/flake.nix
index f1585df..4babfd8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,9 +16,39 @@
       customPackages = pkgs:
         let
           callPackage = pkgs.callPackage;
-        in {
-          linux-lava = callPackage ./packages/linux-lava {};
+        in rec {
+          linux_lava = callPackage ./packages/linux-lava {};
+          linux_tkg = callPackage ./packages/linux-tkg {
+            kernelPatches = with pkgs.kernelPatches; [
+              bridge_stp_helper
+              request_key_helper
+            ];
+          };
+          linuxPackages_tkg = args: pkgs.recurseIntoAttrs (pkgs.linuxPackagesFor (linux_tkg.override args));
           wine-osu = callPackage ./packages/wine-osu { inherit getPaths; };
+        }
+        # For github workflow tests
+        // builtins.listToAttrs (builtins.map (e: {
+          name = "linux_tkg-${e.scheduler}-${pkgs.lib.stringAsChars (x: if x == "." then "" else x) e.version}";
+          value = callPackage ./packages/linux-tkg {
+            inherit (e) scheduler version;
+            kernelPatches = with pkgs.kernelPatches; [
+              bridge_stp_helper
+              request_key_helper
+            ];
+          };
+        }) (pkgs.lib.cartesianProductOfSets {
+          scheduler = ["bmq" "cfs" "cacule" "muqss" "pds"];
+          version = ["5.4" "5.10" "5.12"];
+        })) // {
+          "linux_tkg-upds-510" = callPackage ./packages/linux-tkg {
+            version = "5.10";
+            scheduler = "upds";
+            kernelPatches = with pkgs.kernelPatches; [
+              bridge_stp_helper
+              request_key_helper
+            ];
+          };
         };
 
       overlays = (builtins.map
diff --git a/hosts/winter/kernel.nix b/hosts/winter/kernel.nix
index 68f2cf6..4017db6 100644
--- a/hosts/winter/kernel.nix
+++ b/hosts/winter/kernel.nix
@@ -26,7 +26,19 @@
       "intel_pstate=passive"
       "msr.allow_writes=on"
     ];
-    kernelPackages = pkgs.lib.mkForce (pkgs.linuxPackagesFor pkgs.linux-lava);
+    kernelPackages = pkgs.linuxPackages_tkg {
+      debug = false;
+      scheduler = "cacule";
+      timerFreq = 2000;
+      numa = false;
+      tickless = 1;
+      localVersion = "Lava";
+    };
+    kernelPatches = [{
+      name = "si-clocking";
+      patch = ../../packages/linux-lava/si-manual-clocking.patch;
+    }];
+    #kernelPackages = pkgs.lib.mkForce (pkgs.linuxPackagesFor pkgs.linux-lava);
   };
   zramSwap.enable = true;
 }
diff --git a/packages/linux-tkg/default.nix b/packages/linux-tkg/default.nix
new file mode 100644
index 0000000..28a1753
--- /dev/null
+++ b/packages/linux-tkg/default.nix
@@ -0,0 +1,329 @@
+# FIXME: This entire derivation is extremely ugly.
+{
+  buildLinux
+, fetchFromGitHub
+, lib
+, extraConfig ? {}
+, kernelPatches ? []
+
+, version ? "5.12"
+, debug ? true
+, tcpAlgorithm ? "cubic"
+, scheduler ? "cfs"
+, runqueueSharing ? "smt"
+, timerFreq ? 500
+, defaultGovernor ? "ondemand"
+, ftrace ? true
+, numa ? true
+, tickless ? 2
+
+, enableAnbox ? false
+, bcachefs ? (version == "5.10" || version == "5.12")
+, futex2 ? (lib.versionAtLeast version "5.10")
+, winesync ? (lib.versionAtLeast version "5.12")
+, irqThreading ? false
+, randomTrustCPU ? false
+, smtNice ? true
+, zenify ? true
+
+# TODO: yieldType
+, yieldType ? 1
+# TODO: rrInterval
+, rrInterval ? 0
+
+, acsOverride ? false
+, aggressiveOndemand ? true
+, fsync ? true
+, miscAdditions ? true
+# XXX: This patch is pretty broken
+, zfsFix ? false # (lib.versionOlder version "5.11")
+
+, localVersion ? ""
+
+, ...
+} @ args:
+let
+  sources = import ./sources.nix { inherit fetchFromGitHub lib version; };
+
+  boolToKernel = bool: with lib.kernel; if bool then yes else no;
+  boolToKernelMod = bool: with lib.kernel; if bool then module else no;
+  mapBoolToKernel = bool: list: builtins.listToAttrs (
+    builtins.map (e: {
+      name = e;
+      value = boolToKernel bool;
+    }) list
+  );
+  mapNo = list: mapBoolToKernel false list;
+  mapYes = list: mapBoolToKernel true list;
+  mapNY = list:
+       (mapNo (builtins.elemAt list 0)
+    // mapYes (builtins.elemAt list 1));
+
+  supportedSchedulers = {
+    "5.4" = [ "bmq" "cfs" "cacule" "muqss" "pds" ];
+    "5.10" = [ "bmq" "cfs" "cacule" "muqss" "pds" "upds" ];
+    "5.12" = [ "bmq" "cfs" "cacule" "muqss" "pds" ];
+  };
+
+  # do not put rec please kthx
+  tkgConfig = with lib.kernel; {
+    defaults = let
+      base = {
+        # openrgb
+        I2C_NCT6775 = module;
+        ZSWAP_COMPRESSOR_DEFAULT = freeform "lz4";
+      } // mapNY [
+        [ "DYNAMIC_FAULT" "DEFAULT_FQ_CODEL" "NTP_PPS" "CPU_FREQ_DEFAULT_GOV_PERFORMANCE_NODEF" "ZSWAP_COMPRESSOR_DEFAULT_LZO" "CMDLINE_OVERRIDE" "X86_P6_NOP" "CPU_FREQ_DEFAULT_GOV_ONDEMAND" "CPU_FREQ_DEFAULT_GOV_CONSERVATIVE" "DEBUG_INFO" "PREEMPT_VOLUNTARY" ]
+        [ "DEFAULT_CAKE" "CRYPTO_LZ4" "CRYPTO_LZ4HC" "LZ4_COMPRESS" "LZ4HC_COMPRESS" "ZSWAP_COMPRESSOR_DEFAULT_LZ4" "CMDLINE_BOOL" "TCP_CONG_ADVANCED" "PREEMPT" "PREEMPT_COUNT" "PREEMPTION" "PREEMPT_DYNAMIC" ]
+      ];
+      extras = {
+        "5.4" = {
+          TP_SMAPI = module;
+          RAID6_USE_PREFER_GEN = yes;
+          RCU_BOOST_DELAY = freeform "0";
+        };
+      };
+    in base // (if builtins.hasAttr version extras then extras.${version} else {});
+
+    debug =
+      if debug
+      then mapNo [ "SLUB_DEBUG" "PM_DEBUG" "PM_ADVANCED_DEBUG" "PM_SLEEP_DEBUG" "ACPI_DEBUG" "SCHED_DEBUG" "LATENCYTOP" "DEBUG_PREEMPT" ]
+      else {};
+
+    tcpAlgorithm = let
+      algorithms = [ "yeah" "bbr" "cubic" "vegas" "westwood" "reno" ];
+      base = mapBoolToKernel false (builtins.map(e: "DEFAULT_${lib.toUpper e}") algorithms)
+        // mapBoolToKernel true (builtins.map(e: "TCP_CONG_${lib.toUpper e}") algorithms);
+    in
+      if builtins.elem tcpAlgorithm algorithms
+      then base // {
+        "DEFAULT_${lib.toUpper tcpAlgorithm}" = yes;
+        DEFAULT_TCP_CONG = freeform tcpAlgorithm;
+      }
+      else throw "Unsupported TCP algorithm";
+
+    scheduler = let
+      schedConfigs = {
+        cfs = {};
+        cacule = mapNY [
+          [ "BSD_PROCESS_ACCT" "TASK_XACCT" "CGROUP_CPUACCT" "CGROUP_DEBUG" ]
+          [ "CACULE_SCHED" "SCHED_AUTOGROUP" ]
+        ];
+        muqss = mapNY [
+          [ "CFS_BANDWIDTH" "FAIR_GROUP_SCHED" ]
+          [ "SCHED_MUQSS" ]
+        ];
+        pds = mapNY [
+          [ "CFS_BANDWIDTH" "FAIR_GROUP_SCHED" "SCHED_BMQ" ]
+          [ "SCHED_ALT" "SCHED_PDS" ]
+        ];
+        bmq = mapNY [
+          [ "CFS_BANDWIDTH" "FAIR_GROUP_SCHED" "SCHED_PDS" ]
+          [ "SCHED_ALT" "SCHED_BMQ" ]
+        ];
+        upds = mapNY [
+          [ "CFS_BANDWIDTH" "FAIR_GROUP_SCHED" ]
+          [ "SCHED_PDS" ]
+        ];
+      };
+    in
+      if builtins.hasAttr scheduler schedConfigs
+      then
+        if builtins.elem scheduler supportedSchedulers.${version}
+        then schedConfigs.${scheduler}
+        else throw "Unsupported scheduler for kernel version"
+      else throw "Unknown scheduler";
+
+    runqueueSharing = let
+      types = [ "none" "smt" "mc" "mc_llc" "smp" "all" ];
+      base = mapBoolToKernel false (builtins.map (e: "RQ_${lib.toUpper e}") types);
+    in
+      if (scheduler == "muqss") then
+        if (builtins.elem runqueueSharing types)
+        then base // { "RQ_${lib.toUpper runqueueSharing}" = yes; }
+        else throw "Unknown runqueueSharing type"
+      else {};
+
+    timerFreq = let
+      availableFreqs = [100 250 300 500 750 1000]
+      ++ lib.optional (scheduler == "cacule") 2000;
+
+      base = mapBoolToKernel false (
+        builtins.map (e: "HZ_${builtins.toString e}") availableFreqs
+        ++ builtins.map (e: "HZ_${builtins.toString e}_NODEF") availableFreqs
+      );
+    in
+      if builtins.elem timerFreq availableFreqs
+      then base // {
+        "HZ_${builtins.toString timerFreq}" = yes;
+        "HZ_${builtins.toString timerFreq}_NODEF" = yes;
+      }
+      else throw "Unsupported timer frequency";
+
+    defaultGovernor = let
+      governors = {
+        schedutil = {};
+        performance = mapNY [
+          [ "CPU_FREQ_DEFAULT_GOV_SCHEDUTIL" ]
+          [ "CPU_FREQ_DEFAULT_GOV_PERFORMANCE" "CPU_FREQ_DEFAULT_GOV_PERFORMANCE_NODEF" ]
+        ];
+        ondemand = mapNY [
+          [ "CPU_FREQ_DEFAULT_GOV_SCHEDUTIL" ]
+          [ "CPU_FREQ_DEFAULT_GOV_ONDEMAND" "CPU_FREQ_GOV_ONDEMAND" ]
+        ];
+      };
+    in
+      if builtins.hasAttr defaultGovernor governors
+      then governors.${defaultGovernor}
+      else throw "Unsupported default governor";
+
+    ftrace = mapBoolToKernel ftrace [ "FUNCTION_TRACER" "FUNCTION_GRAPH_TRACER" ];
+    numa = if numa then {} else mapNo [ "NUMA" "AMD_NUMA" "ACPI_NUMA" "X86_64_ACPI_NUMA" "NODES_SPAN_OTHER_NODES" "NUMA_EMU" "NODES_SHIFT" "NEED_MULTIPLE_NODES" "USE_PERCPU_NUMA_NODE_ID" ];
+    tickless = let
+      modes = [
+        # Periodic ticks
+        (mapNY [
+          [ "NO_HZ_FULL_NODEF" "NO_HZ_IDLE" "NO_HZ_FULL" "NO_HZ" "NO_HZ_COMMON" ]
+          [ "HZ_PERIODIC" ]
+        ])
+        # Tickless
+        (mapNY [
+          [ "HZ_PERIODIC" "NO_HZ_IDLE" "CONTEXT_TRACKING_FORCE" ]
+          [ "NO_HZ_FULL_NODEF" "NO_HZ_FULL" "NO_HZ" "NO_HZ_COMMON" "CONTEXT_TRACKING" ]
+        ])
+        # Tickless idle
+        (mapNY [
+          [ "HZ_PERIODIC" "NO_HZ_FULL_NODEF" "NO_HZ_FULL" ]
+          [ "NO_HZ_IDLE" "NO_HZ" "NO_HZ_COMMON" ]
+        ])
+      ];
+    in
+      if builtins.length modes >= tickless
+      then builtins.elemAt modes tickless
+      else throw "Unsupported tickless value";
+
+    anbox =
+      if enableAnbox
+      then
+        { ANDROID_BINDER_DEVICES = freeform "binder,hwbinder,vndbinder"; }
+        // mapNY [
+          [ "ION_SYSTEM_HEAP" "ANDROID_BINDER_IPC_SELFTEST" ]
+          [ "ASHMEM" "ION" "ION_CMA_HEAP" "ANDROID" "ANDROID_BINDER_IPC" "ANDROID_BINDERFS" ]
+        ]
+      else {};
+    bcachefs =
+      if bcachefs
+      then
+        { BCACHEFS_FS = module; }
+        // mapNY [
+          [ "BCACHEFS_DEBUG" "BCACHEFS_TESTS" "DEBUG_CLOSURES" ]
+          [ "BCACHEFS_QUOTA" "BCACHEFS_POSIX_ACL" ]
+        ]
+      else {};
+
+    futex2 = { FUTEX2 = boolToKernel futex2; };
+    winesync = { WINESYNC = boolToKernelMod winesync; };
+    irqThreading = { FORCE_IRQ_THREADING = boolToKernel irqThreading; };
+    randomTrustCPU = { RANDOM_TRUST_CPU = boolToKernel randomTrustCPU; };
+    smtNice = { SMT_NICE = boolToKernel smtNice; };
+    zenify = { ZENIFY = boolToKernel zenify; };
+  };
+  flattenedConfig = with lib; mapAttrs (_: head) (zipAttrs (attrValues tkgConfig));
+
+  patchNames = [
+    "0002-clear-patches"
+    "0003-glitched-base"
+  ]
+  ++ lib.optional ((lib.versionAtLeast version "5.10") && miscAdditions) "0012-misc-additions"
+  ++ lib.optionals (version == "5.12") [
+    "0001-mm-Support-soft-dirty-flag-reset-for-VA-range"
+    "0002-mm-Support-soft-dirty-flag-read-with-reset"
+  ]
+  ++ (
+    let
+      prjcRevisions = {
+        "5.10" = "2";
+        "5.12" = "1";
+      };
+      map = {
+        muqss = [
+          "0004-${version}-ck1"
+          "0004-glitched-muqss"
+        ];
+        upds = [
+          "0005-v${version}_undead-pds099o"
+          "0005-undead-glitched-pds"
+        ];
+        pds = if version == "5.4"
+          then [
+            "0005-v${version}_undead-pds099o"
+            "0005-glitched-pds"
+          ]
+          else [
+            "0009-prjc_v${version}-r${prjcRevisions.${version}}"
+            "0005-glitched-pds"
+          ];
+        bmq = if version == "5.4"
+          then [
+            "0009-bmq_v5.4-r2"
+            "0009-glitched-bmq"
+          ]
+          else [
+            "0009-prjc_v${version}-r${prjcRevisions.${version}}"
+            "0009-glitched-bmq"
+          ];
+        cacule = [
+          "0003-cacule-${version}"
+          "0003-glitched-cfs"
+        ];
+        cfs = ["0003-glitched-cfs"];
+      };
+    in
+    if (builtins.hasAttr scheduler map) && (map.${scheduler} != {})
+    then map.${scheduler}
+    else []
+  )
+  ++ lib.optional acsOverride "0006-add-acs-overrides_iommu"
+  ++ lib.optionals aggressiveOndemand (
+    let map = rec {
+      muqss = "0004-glitched-ondemand-muqss";
+      upds = "0005-undead-glitched-ondemand-pds";
+      pds = if version == "5.4"
+        then "0005-glitched-ondemand-pds"
+        else "0009-glitched-ondemand-bmq";
+      bmq = if version != "5.4"
+        then "0009-glitched-ondemand-bmq"
+        else {};
+    }; in
+    if (builtins.hasAttr scheduler map) && (map.${scheduler} != {})
+    then [map.${scheduler}]
+    else []
+  )
+  ++ lib.optional bcachefs "0008-${version}-bcachefs"
+  ++ lib.optional fsync "0007-v${version}-fsync"
+  ++ lib.optional futex2 "0007-v${version}-futex2_interface"
+  ++ lib.optional winesync "0007-v${version}-winesync"
+  ++ lib.optional zfsFix "0011-ZFS-fix";
+
+  toPatch = name: {
+    inherit name;
+    patch = "${sources.tkg}/linux-tkg-patches/${version}/${name}.patch";
+  };
+  tkgPatches = builtins.map (e: toPatch e) patchNames;
+
+  suffix = if builtins.stringLength localVersion != 0 then "-tkg-${localVersion}" else "-tkg";
+in buildLinux(args // rec {
+  version = sources.fullVersion + suffix;
+  modDirVersion = version;
+
+  isZen = zenify;
+
+  ignoreConfigErrors = true;
+  structuredExtraConfig = with lib.kernel; builtins.mapAttrs (_: value: lib.mkForce value) ({
+    LOCALVERSION = freeform suffix;
+  } // flattenedConfig
+    // extraConfig);
+
+  kernelPatches = tkgPatches;
+  src = sources.kernelSrc;
+} // (args.argsOverride or {}))
diff --git a/packages/linux-tkg/sources.nix b/packages/linux-tkg/sources.nix
new file mode 100644
index 0000000..8a30019
--- /dev/null
+++ b/packages/linux-tkg/sources.nix
@@ -0,0 +1,37 @@
+{ fetchFromGitHub, lib, version }:
+let
+  vMap = {
+    "5.4" = {
+      version = "5.4.128";
+      hash = "1arrpskxkkl6vb06d4y4xvfy1355mjk5ac5sp66657kbh6xswm1v";
+    };
+    "5.10" = {
+      version = "5.10.46";
+      hash = "058lvk0hc6qk3l485kda7cxkdrjk1kd0f75cp7pmnckbkjij54an";
+    };
+    "5.12" = {
+      version = "5.12.13";
+      hash = "0mfjkncsa7vq13689dzzwms6wzsaj347qm1vf7k82nb3wp6myj5g";
+    };
+  };
+
+  tkg = fetchFromGitHub {
+    owner = "Frogging-Family";
+    repo = "linux-tkg";
+    rev = "c93cfdd20da1cf3b0860895c278b5a4676ccb057";
+    sha256 = "0xpkdjq2ickhb8pqzqv5avjmrg3qyzryy8qv1wr9dxpkx197swdx";
+  };
+
+  ver =
+    if builtins.hasAttr version vMap
+    then vMap.${version}
+    else throw "Unsupported version";
+in rec {
+  inherit tkg;
+
+  fullVersion = ver.version;
+  kernelSrc = builtins.fetchurl {
+    url = "https://cdn.kernel.org/pub/linux/kernel/v${lib.versions.major version}.x/linux-${fullVersion}.tar.xz";
+    sha256 = ver.hash;
+  };
+}