diff --git a/nix/configuration/roles/amd_s2idle/cysystemd.nix b/nix/configuration/roles/amd_s2idle/cysystemd.nix
index 0337b98..d7262e5 100644
--- a/nix/configuration/roles/amd_s2idle/cysystemd.nix
+++ b/nix/configuration/roles/amd_s2idle/cysystemd.nix
@@ -1,76 +1,48 @@
-# unpackPhase
-# patchPhase
-# configurePhase
-# buildPhase
-# checkPhase
-# installPhase
-# fixupPhase
-# installCheckPhase
-# distPhase
 {
-  stdenv,
-  pkgs,
-  sqlite,
-  makeWrapper,
   lib,
-  python3,
-  systemd,
-  # setuptools,
-  # cython,
+  pkgs,
+  buildPythonPackage,
+  fetchFromGitHub,
+  pythonOlder,
+  cython,
   pkg-config,
-  # python3Packages,
-  ...
+  setuptools,
 }:
+
 let
   version = "1.6.3";
 in
-python3.pkgs.buildPythonPackage {
+buildPythonPackage {
   pname = "cysystemd";
-  version = version;
+  inherit version;
   pyproject = true;
 
-  # format = "pyproject";
+  src = fetchFromGitHub {
+    owner = "mosquito";
+    repo = "cysystemd";
+    tag = version;
+    hash = "sha256-xumrQgoKfFeKdRQUIYXXiXEcNd76i4wo/EIDm8BN7oU=";
+  };
+
+  disabled = pythonOlder "3.6";
 
   build-system = [
-    python3.pkgs.setuptools
-    python3.pkgs.cython
+    setuptools
+    cython
   ];
-  buildInputs = [ systemd ];
-  nativeBuildInputs = with python3.pkgs; [
-    # setuptools
-    # setuptools-git-versioning
-    # setuptools-git
-    # pyudev
-    # pkgs.systemd
+
+  nativeBuildInputs = [
     pkg-config
   ];
-  propagatedBuildInputs = with python3.pkgs; [
-    # pyudev
-    # pandas
-    # jinja2
-    # tabulate
-    # seaborn
-    # cysystemd
-    # jinja2
-    # matplotlib
-    # seaborn
-  ];
-  src = pkgs.fetchgit {
-    url = "https://github.com/mosquito/cysystemd.git";
-    tag = version;
-    sha256 = "sha256-xumrQgoKfFeKdRQUIYXXiXEcNd76i4wo/EIDm8BN7oU=";
-    # leaveDotGit = true;
-  };
 
-  # postPatch = ''
-  #   substituteInPlace pyproject.toml \
-  #     --replace-fail ', "setuptools-git-versioning>=2.0,<3"' ""
-  # '';
+  buildInputs = [ pkgs.systemd ];
 
-  meta = with lib; {
+  pythonImportsCheck = [ "cysystemd" ];
+
+  meta = {
     description = "systemd wrapper on Cython";
     homepage = "https://github.com/mosquito/cysystemd";
-    license = licenses.asl20;
-    platforms = platforms.linux;
+    license = lib.licenses.asl20;
+    platforms = lib.platforms.linux;
   };
 }
diff --git a/nix/configuration/roles/amd_s2idle/default.nix b/nix/configuration/roles/amd_s2idle/default.nix
index ace417a..edfe1ed 100644
--- a/nix/configuration/roles/amd_s2idle/default.nix
+++ b/nix/configuration/roles/amd_s2idle/default.nix
@@ -21,7 +21,7 @@
     lib.mkMerge [
       {
         environment.systemPackages = with pkgs; [
-          amd_s2idle
+          amd-debug-tools
         ];
         nixpkgs.overlays = [
           (
@@ -30,28 +30,16 @@
               innerPackage = (final.callPackage ./package.nix { });
             in
             {
-              amd_s2idle = innerPackage;
-              # amd_s2idle = final.buildEnv {
-              #   name = innerPackage.name;
-              #   paths = [
-              #     innerPackage
-              #   ];
-              #   nativeBuildInputs = [ final.makeWrapper ];
-              #   postBuild = ''
-              #     wrapProgram $out/bin/amd_s2idle --prefix PATH : ${
-              #       lib.makeBinPath [
-              #         (final.python3.withPackages (python-pkgs: [
-              #           python-pkgs.distro # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
-              #           python-pkgs.pyudev # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
-              #           python-pkgs.systemd # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
-              #           python-pkgs.packaging # For https://gitlab.freedesktop.org/drm/amd/-/blob/master/scripts/amd_s2idle.py
-              #         ]))
-              #       ]
-              #     }
-              #   '';
-              # };
+              amd-debug-tools = innerPackage;
             }
           )
+          (final: prev: {
+            pythonPackagesExtensions = prev.pythonPackagesExtensions ++ [
+              (python-final: python-prev: {
+                cysystemd = (python-final.callPackage ./cysystemd.nix { });
+              })
+            ];
+          })
         ];
       }
     ]
diff --git a/nix/configuration/roles/amd_s2idle/package.nix b/nix/configuration/roles/amd_s2idle/package.nix
index 6df6b6c..d47826f 100644
--- a/nix/configuration/roles/amd_s2idle/package.nix
+++ b/nix/configuration/roles/amd_s2idle/package.nix
@@ -1,44 +1,28 @@
-# unpackPhase
-# patchPhase
-# configurePhase
-# buildPhase
-# checkPhase
-# installPhase
-# fixupPhase
-# installCheckPhase
-# distPhase
 {
-  stdenv,
-  pkgs,
-  sqlite,
-  makeWrapper,
   lib,
-  python3,
-  callPackage,
-  # python3Packages,
+  fetchgit,
+  python3Packages,
   acpica-tools,
   ethtool,
   libdisplay-info,
-  ...
 }:
+
 let
   version = "0.2.7";
 in
-python3.pkgs.buildPythonApplication {
+python3Packages.buildPythonApplication {
   pname = "amd-debug-tools";
-  version = version;
+  inherit version;
   pyproject = true;
 
-  # name = "amd-debug-tools";
-  # format = "pyproject";
-  nativeBuildInputs = with python3.pkgs; [
+  build-system = with python3Packages; [
     setuptools
     setuptools-git-versioning
     setuptools-git
     pyudev
   ];
-  propagatedBuildInputs = with python3.pkgs; [
-    (callPackage ./cysystemd.nix { })
+  dependencies = with python3Packages; [
+    cysystemd
     jinja2
     matplotlib
     pandas
@@ -49,22 +33,26 @@ python3.pkgs.buildPythonApplication {
     ethtool
     libdisplay-info
   ];
-  src = pkgs.fetchgit {
+  src = fetchgit {
     url = "https://git.kernel.org/pub/scm/linux/kernel/git/superm1/amd-debug-tools.git";
     tag = version;
-    sha256 = "sha256-6X9cUKN0BkkKcYGU+YJYCGT+l5iUZDN+D8Fqq/ns98Q=";
+    hash = "sha256-6X9cUKN0BkkKcYGU+YJYCGT+l5iUZDN+D8Fqq/ns98Q=";
     leaveDotGit = true;
   };
 
+  disabled = python3Packages.pythonOlder "3.7";
+
   postPatch = ''
     substituteInPlace pyproject.toml \
       --replace-fail ', "setuptools-git-versioning>=2.0,<3"' ""
   '';
 
-  meta = with lib; {
+  pythonImportsCheck = [ "amd_debug" ];
+
+  meta = {
     description = "Debug tools for AMD zen systems";
     homepage = "https://git.kernel.org/pub/scm/linux/kernel/git/superm1/amd-debug-tools.git/";
-    license = licenses.mit;
-    platforms = platforms.linux;
+    license = lib.licenses.mit;
+    platforms = lib.platforms.linux;
   };
 }
diff --git a/nix/configuration/roles/optimized_build/default.nix b/nix/configuration/roles/optimized_build/default.nix
index 2600b7b..0158945 100644
--- a/nix/configuration/roles/optimized_build/default.nix
+++ b/nix/configuration/roles/optimized_build/default.nix
@@ -127,6 +127,13 @@
               );
             })
             # (final: prev: {
+            #   python = prev.python.override {
+            #     packageOverrides = python-final: python-prev: {
+            #       inherit (pkgs-unoptimized.pythonPackages) coverage;
+            #     };
+            #   };
+            # })
+            # (final: prev: {
             #   pythonPackagesOverlays = prev.pythonPackagesOverlays.extend (
             #     final': prev': {
             #       inherit (pkgs-unoptimized.pythonPackagesOverlays)
@@ -135,6 +142,13 @@
             #     }
             #   );
             # })
+            # (final: prev: {
+            #   pythonPackagesExtensions = prev.pythonPackagesExtensions ++ [
+            #     (python-final: python-prev: {
+            #       inherit (pkgs-unoptimized.pythonPackages) coverage;
+            #     })
+            #   ];
+            # })
             (final: prev: {
               inherit (pkgs-unoptimized)
                 gsl