diff --git a/README.md b/README.md
index 8a49d90..d4f6466 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,10 @@
 
 Flahub repository for [LogarithmPlotter](https://apps.ad5001.eu/logarithmplotter/).
 
+## KF6
+
+The files in the `kf6` directory contain the most barebones instalations of the KDE Frameworks 6 to install the QtQuick Controls 2 Desktop Theme or Breeze Styles. They're not used in LogarithmPlotter for now, as the cost vs benefits ratio is minimal (longer load times against slightly higher fidelity to KDE desktop theme, but still no theme awareness, or proper breeze icons integration)
+
 ## Build
 
 You can build the latest version of LogarithmPlotter flatpak using `flatpak-builder`:    
diff --git a/eu.ad5001.LogarithmPlotter.json b/eu.ad5001.LogarithmPlotter.json
index d0c7fdd..2fde512 100644
--- a/eu.ad5001.LogarithmPlotter.json
+++ b/eu.ad5001.LogarithmPlotter.json
@@ -1,54 +1,67 @@
 {
     "app-id": "eu.ad5001.LogarithmPlotter",
     "runtime": "org.kde.Platform",
-    "runtime-version": "5.15-21.08",
+    "runtime-version": "6.4",
     "sdk": "org.kde.Sdk",
     "finish-args": [
         "--share=ipc",
         "--device=dri",
-        "--socket=fallback-x11",
+        "--socket=x11",
         "--socket=wayland",
         "--filesystem=home",
+        "--talk-name=org.freedesktop.portal.FileChooser",
         "--env=PATH=/app/bin:/usr/bin:/app/texlive-bin:/app/texlive/bin:/app/texlive/bin/x86_64-linux:/app/texlive/bin/aarch64-linux"
     ],
     "add-extensions": {
         "org.freedesktop.Sdk.Extension.texlive": {
             "directory": "texlive",
-            "version": "21.08"
+            "version": "22.08"
         }
     },
-    "sdk-extensions": ["org.freedesktop.Sdk.Extension.llvm12"],
     "command": "logarithmplotter",
     "rename-desktop-file": "logarithmplotter.desktop",
     "rename-icon": "logplotter",
     "modules": [
         {
-            "name": "PySide2",
-            "buildsystem": "cmake-ninja",
-            "builddir": true,
+            "name": "pyside6",
+            "buildsystem": "simple",
             "build-options": {
-                "prepend-path": "/usr/lib/sdk/llvm12/bin",
-                "prepend-ld-library-path": "/usr/lib/sdk/llvm12/lib"
+                "env": {
+                    "GIT_ALLOW_PROTOCOL": "file:https:git"
+                }
             },
-            "config-opts": [
-                "-DCMAKE_BUILD_TYPE=Release",
-                "-DBUILD_TESTS=OFF"
+            "build-commands": [
+                "pip3 install --verbose --exists-action=i --no-index --find-links=\"file://${PWD}\" --prefix=${FLATPAK_DEST} pyside6_essentials --no-build-isolation",
+                "rm -rf ${FLATPAK_DEST}/bin/pyside6-{assistant,designer,linguist,lrelease,lupdate,qmllint}",
+                "rm -rf ${FLATPAK_DEST}/lib/python3.*/site-packages/PySide6/{assistant,designer,linguist,lrelease,lupdate,qmllint}",
+                "rm -rf ${FLATPAK_DEST}/lib/python3.*/site-packages/PySide6/{examples,Qt/resources}",
+                "rm -rf ${FLATPAK_DEST}/lib/python3.*/site-packages/PySide6/Qt/qml/QtQuick/Controls/{Imagine,Material,Universal,designer}",
+                "rm -rf ${FLATPAK_DEST}/lib/python3.*/site-packages/PySide6/Qt/translations/{qtwebengine_locales,linguist*,assistant*,designer*,qtdeclarative*,qt_help*}",
+                "rm -rf ${FLATPAK_DEST}/lib/python3.*/site-packages/PySide6/Qt/{lib,libexec}"
             ],
             "sources": [
                 {
-                    "type": "archive",
-                    "url": "https://download.qt.io/official_releases/QtForPython/pyside2/PySide2-5.15.3-src/pyside-setup-opensource-src-5.15.3.tar.xz",
-                    "sha256": "7ff5f1cc4291fffb6d5a3098b3090abe4d415da2adec740b4e901893d95d7137"
-                },
+                    "type": "file",
+                    "url": "https://files.pythonhosted.org/packages/51/23/44fe28b2b7ee64cb53b72ab3b559cb41986a218e98d1fe298bedf903898e/PySide6_Essentials-6.4.3-cp37-abi3-manylinux_2_28_x86_64.whl",
+                    "sha256": "7983cf2152dfebf3c2d0767d12e452c4bd0809aa53777fef949a7ff4b0ef8a49"
+                }
+            ],
+            "modules": [
                 {
-                    "type": "shell",
-                    "commands": [
-                        "mkdir -p /app/include/qt5tmp && cp -R /usr/include/Qt* /app/include/qt5tmp # https://bugreports.qt.io/broswse/PYSIDE-787",
-                        "sed -i 's|--include-paths=|--include-paths=/app/include/qt5tmp:|' sources/pyside2/cmake/Macros/PySideModules.cmake"
+                    "name": "shiboken6",
+                    "buildsystem": "simple",
+                    "build-commands": [
+                        "pip3 install --verbose --exists-action=i --no-index --find-links=\"file://${PWD}\" --prefix=${FLATPAK_DEST} shiboken6 --no-build-isolation"
+                    ],
+                    "sources": [
+                        {
+                            "type": "file",
+                            "url": "https://files.pythonhosted.org/packages/f9/52/4461d3d5cabfaeb56562d72a4b1013ecf1fd7be2ef7bebdc7649d56ab1b8/shiboken6-6.4.3-cp37-abi3-manylinux_2_28_x86_64.whl",
+                            "sha256": "74570273004d2e481e55618150dfaee7ae253027b438066e216b339fae1e999a"
+                        }
                     ]
                 }
             ]
-
         },
         {
             "name": "texlive",
@@ -73,8 +86,8 @@
                 "cd LogarithmPlotter/i18n && bash release.sh",
                 "mkdir -p /app/share/metainfo/",
                 "mv eu.ad5001.LogarithmPlotter.metainfo.xml /app/share/metainfo/eu.ad5001.LogarithmPlotter.metainfo.xml # Add metainfo file from current repository.",
-                "PREFIX=\"/app/share\" FLATPAK_INSTALL=1 python3 setup.py install --prefix=/app",
-                "cp CHANGELOG.md /app/lib/python3.*/site-packages/logarithmplotter-*-py3.*.egg/LogarithmPlotter/util/ # Copy changelog into the directory needed for it to be cached."
+                "PREFIX=\"/app/share\" FLATPAK_INSTALL=1 pip3 install --verbose --no-index --prefix=${FLATPAK_DEST} --no-build-isolation --no-deps .",
+                "cp CHANGELOG.md /app/lib/python3.*/site-packages/LogarithmPlotter/util/ # Copy changelog into the directory needed for it to be cached."
             ],
             "post-install": [
                 "mv ${MIME_PATH}/x-logarithm-plot.xml ${MIME_PATH}/eu.ad5001.LogarithmPlotter-x-logarithm-plot.xml",
@@ -85,8 +98,8 @@
                 {
                     "type": "git",
                     "url": "https://git.ad5001.eu/Ad5001/LogarithmPlotter",
-                    "tag": "v0.3.0",
-                    "commit": "839f8e9f367146a195681c30217f7229eac8c319"
+                    "tag": "v0.4.0",
+                    "commit": "08edd7be14f69d495b9a124fb534969615a18e87"
                 },
                 {
                     "type": "file",