diff --git a/all-packages.nix b/all-packages.nix
index 46750ec6..5b71bf87 100644
--- a/all-packages.nix
+++ b/all-packages.nix
@@ -4,8 +4,16 @@
     gnunet-messenger-cli = callPackage ./pkgs/gnunet-messenger-cli {};
     liberaforms = callPackage ./pkgs/liberaforms {};
     liberaforms-env = callPackage ./pkgs/liberaforms/env.nix {};
+    kikit = callPackage ./pkgs/kikit {};
   };
 
-  callPackage = newScope self;
+  nixpkgs-candidates = {
+    pcbnew-transition = callPackage ./nixpkgs-candidates/pcbnew-transition {};
+    pybars3 = callPackage ./nixpkgs-candidates/pybars3 {};
+    pymeta3 = callPackage ./nixpkgs-candidates/pymeta3 {};
+    euclid3 = callPackage ./nixpkgs-candidates/euclid3 {};
+  };
+
+  callPackage = newScope (self // nixpkgs-candidates // {inherit callPackage;});
 in
   self
diff --git a/nixpkgs-candidates/euclid3/default.nix b/nixpkgs-candidates/euclid3/default.nix
new file mode 100644
index 00000000..0ad67ed7
--- /dev/null
+++ b/nixpkgs-candidates/euclid3/default.nix
@@ -0,0 +1,27 @@
+{
+  python3,
+  lib,
+  fetchPypi,
+}: let
+  inherit (python3.pkgs) buildPythonPackage;
+in
+  buildPythonPackage rec {
+    pname = "euclid3";
+    version = "0.01";
+    format = "setuptools";
+
+    src = fetchPypi {
+      inherit pname version;
+      hash = "sha256-JbgnpXrb/Zo/qGJeQ6vD6Qf2HeYiND5+U4SC75tG/Qs=";
+    };
+
+    pythonImportsCheck = [
+      "euclid3"
+    ];
+
+    meta = with lib; {
+      description = "2D and 3D vector, matrix, quaternion and geometry module.";
+      homepage = "http://code.google.com/p/pyeuclid/";
+      license = licenses.lgpl21Plus;
+    };
+  }
diff --git a/nixpkgs-candidates/pcbnew-transition/default.nix b/nixpkgs-candidates/pcbnew-transition/default.nix
new file mode 100644
index 00000000..b975effe
--- /dev/null
+++ b/nixpkgs-candidates/pcbnew-transition/default.nix
@@ -0,0 +1,40 @@
+{
+  python3,
+  fetchPypi,
+  lib,
+}: let
+  inherit (python3.pkgs) buildPythonPackage;
+
+  properCaseName = "pcbnewTransition";
+in
+  buildPythonPackage rec {
+    pname = properCaseName;
+    version = "0.3.4";
+    format = "setuptools";
+
+    disabled = python3.pythonOlder "3.7";
+
+    src = fetchPypi {
+      inherit pname version;
+      hash = "sha256-3CJUG1kd63Lg0r9HpJRIvttHS5s2EuZRoxeXrqsJ/kQ=";
+    };
+
+    propagatedBuildInputs = with python3.pkgs; [
+      kicad
+    ];
+
+    nativeBuildInputs = with python3.pkgs; [
+      versioneer
+    ];
+
+    pythonImportsCheck = [
+      properCaseName
+    ];
+
+    meta = with lib; {
+      description = "Library that allows you to support both, KiCAD 5 and KiCAD 6 in your plugins";
+      homepage = "https://github.com/yaqwsx/pcbnewTransition";
+      changelog = "https://github.com/yaqwsx/pcbnewTransition/releases/tag/v${version}";
+      license = licenses.mit;
+    };
+  }
diff --git a/nixpkgs-candidates/pybars3/default.nix b/nixpkgs-candidates/pybars3/default.nix
new file mode 100644
index 00000000..3193875d
--- /dev/null
+++ b/nixpkgs-candidates/pybars3/default.nix
@@ -0,0 +1,37 @@
+{
+  python3,
+  fetchPypi,
+  lib,
+  pymeta3,
+}:
+python3.pkgs.buildPythonPackage rec {
+  pname = "pybars3";
+  version = "0.9.7";
+  format = "setuptools";
+
+  src = fetchPypi {
+    inherit pname version;
+    hash = "sha256-ashH6QXlO5xbk2rxEskQR14nv3Z/efRSjBb5rx7A4lI=";
+  };
+
+  propagatedBuildInputs = with python3.pkgs; [
+    pymeta3
+  ];
+
+  checkPhase = ''
+    runHook preCheck
+    ${python3.interpreter} tests.py
+    runHook postCheck
+  '';
+
+  pythonImportsCheck = [
+    "pybars"
+  ];
+
+  meta = with lib; {
+    description = "Handlebars.js template support for Python 3 and 2";
+    homepage = "https://github.com/wbond/pybars3";
+    changelog = "https://github.com/wbond/pybars3/releases/tag/${version}";
+    license = licenses.lgpl3Only;
+  };
+}
diff --git a/nixpkgs-candidates/pymeta3/default.nix b/nixpkgs-candidates/pymeta3/default.nix
new file mode 100644
index 00000000..8437ba5e
--- /dev/null
+++ b/nixpkgs-candidates/pymeta3/default.nix
@@ -0,0 +1,32 @@
+{
+  python3,
+  fetchPypi,
+  lib,
+}: let
+  inherit (python3.pkgs) buildPythonPackage;
+  properCaseName = "PyMeta3";
+in
+  buildPythonPackage rec {
+    pname = lib.toLower properCaseName;
+    version = "0.5.1";
+    format = "setuptools";
+
+    src = fetchPypi {
+      inherit version;
+      pname = properCaseName;
+      hash = "sha256-GL2jJtmpu/WHv8DuC8loZJZNeLBnKIvPVdTZhoHQW8s=";
+    };
+
+    doCheck = false; # Tests do not support Python3
+
+    pythonImportsCheck = [
+      "pymeta"
+    ];
+
+    meta = with lib; {
+      description = "Pattern-matching language based on OMeta for Python 3 and 2";
+      homepage = "https://github.com/wbond/pymeta3";
+      changelog = "https://github.com/wbond/pymeta3/releases/tag/${version}";
+      license = licenses.mit;
+    };
+  }
diff --git a/pkgs/kikit/default.nix b/pkgs/kikit/default.nix
new file mode 100644
index 00000000..8134154b
--- /dev/null
+++ b/pkgs/kikit/default.nix
@@ -0,0 +1,90 @@
+{
+  lib,
+  pcbnew-transition,
+  pybars3,
+  python3,
+  fetchFromGitHub,
+  bats,
+  callPackage,
+}: let
+  properCaseName = "KiKit";
+
+  solidpython = callPackage ./solidpython {};
+
+  # https://github.com/yaqwsx/KiKit/issues/574
+  shapelyPkgsRoot = fetchFromGitHub {
+    owner = "NixOS";
+    repo = "nixpkgs";
+    rev = "8d8e62e74f511160a599471549a98bc9e4f4818d";
+    sha256 = "sha256-2vm6IAnaCo5KAA5/rWSb6dzJsS/raEqR93xbM2/jgng=";
+  };
+
+  shapelyFile = "${shapelyPkgsRoot}/pkgs/development/python-modules/shapely";
+
+  shapely =
+    python3.pkgs.callPackage
+    shapelyFile
+    {};
+in
+  python3.pkgs.buildPythonPackage rec {
+    pname = lib.toLower properCaseName;
+    version = "1.3.0";
+    format = "setuptools";
+
+    disabled = python3.pythonOlder "3.7";
+
+    src = fetchFromGitHub {
+      owner = "yaqwsx";
+      repo = properCaseName;
+      rev = "v${version}";
+      hash = "sha256-kDTPk/R3eZtm4DjoUV4tSQzjGQ9k8MKQedX4oUXYzeo=";
+    };
+
+    propagatedBuildInputs = with python3.pkgs;
+      [
+        kicad
+        numpy
+        click
+        markdown2
+        commentjson
+        # https://github.com/yaqwsx/KiKit/issues/575
+        wxPython_4_2
+      ]
+      ++ [
+        pcbnew-transition
+        shapely
+        pybars3
+        # https://github.com/yaqwsx/KiKit/issues/576
+        solidpython
+      ];
+
+    nativeBuildInputs = with python3.pkgs; [
+      versioneer
+    ];
+
+    nativeCheckInputs = with python3.pkgs;
+      [
+        pytest
+      ]
+      ++ [
+        bats
+      ];
+
+    pythonImportsCheck = [
+      pname
+    ];
+
+    checkPhase = ''
+      runHook preCheck
+      export PATH=$PATH:$out/bin
+      make test
+      runHook postCheck
+    '';
+
+    meta = with lib; {
+      description = "Automation for KiCAD boards";
+      homepage = "https://github.com/yaqwsx/KiKit/";
+      changelog = "https://github.com/yaqwsx/KiKit/releases/tag/v${version}";
+      license = licenses.mit;
+    };
+  }
diff --git a/pkgs/kikit/solidpython/default.nix b/pkgs/kikit/solidpython/default.nix
new file mode 100644
index 00000000..5c6c0a4b
--- /dev/null
+++ b/pkgs/kikit/solidpython/default.nix
@@ -0,0 +1,90 @@
+# SolidPython is an unmaintained library with old dependencies.
+{
+  python3,
+  fetchFromGitHub,
+  fetchFromGitLab,
+  fetchpatch,
+  lib,
+  euclid3,
+}: let
+  inherit (python3.pkgs) buildPythonPackage;
+
+  # https://github.com/SolidCode/SolidPython/issues/207
+  prettytablePkgsRoot = fetchFromGitHub {
+    owner = "NixOS";
+    repo = "nixpkgs";
+    rev = "6dda65e8da23cc123060e3f24723471a15b3f0cd";
+    sha256 = "sha256-1zdXZIs5C81slD+nLeIk5j+O/aAujejbiW4g07JHU5s=";
+  };
+
+  prettytableFile = "${prettytablePkgsRoot}/pkgs/development/python-modules/prettytable";
+
+  prettytable =
+    python3.pkgs.callPackage
+    prettytableFile
+    {
+      # stdenv seems to have moved since then. Shim something that'll make this
+      # old version of prettytable happy.
+      stdenv = {
+        inherit lib;
+      };
+    };
+
+  pypng = python3.pkgs.pypng.overrideAttrs (old: rec {
+    version = "0.0.19";
+    src = fetchFromGitLab {
+      owner = "drj11";
+      repo = "pypng";
+      rev = "refs/tags/${old.pname}-${version}";
+      hash = "sha256-XVsXgvLVFfxrRXDwdZO7oi7LPozN2XiYeXCK9NTx4Qs=";
+    };
+    patches = [
+      (fetchpatch {
+        url = "https://gitlab.com/drj11/pypng/-/commit/fe9c973c5e92f24746dfa1be8796c14a2befec4f.diff";
+        hash = "sha256-OYO8TE4MRHhRmgLjetk4TajFT7INQ9WdjCRjDsGc+pg=";
+      })
+    ];
+
+    disabledTests = [
+      "test_test_dir"
+    ];
+  });
+in
+  buildPythonPackage rec {
+    pname = "solidpython";
+    version = "1.1.3";
+    format = "pyproject";
+
+    src = fetchFromGitHub {
+      owner = "SolidCode";
+      repo = "SolidPython";
+      rev = "d962740d600c5dfd69458c4559fc416b9beab575";
+      hash = "sha256-3fJta2a5c8hV9FPwKn5pj01aBtsCGSRCz3vvxR/5n0Q=";
+    };
+
+    propagatedBuildInputs = with python3.pkgs;
+      [
+        ply
+        setuptools
+      ]
+      ++ [
+        prettytable
+        euclid3
+        pypng
+      ];
+
+    buildInputs = with python3.pkgs; [
+      poetry-core
+    ];
+
+    pythonImportsCheck = [
+      "solid"
+    ];
+
+    meta = with lib; {
+      description = "Python interface to the OpenSCAD declarative geometry language";
+      homepage = "https://github.com/SolidCode/SolidPython";
+      changelog = "https://github.com/SolidCode/SolidPython/releases/tag/v${version}";
+      license = licenses.lgpl21Plus;
+    };
+  }