diff --git a/pkgs/applications/graphics/krita/generic.nix b/pkgs/applications/graphics/krita/generic.nix
index a0819a203e72..825e8882a557 100644
--- a/pkgs/applications/graphics/krita/generic.nix
+++ b/pkgs/applications/graphics/krita/generic.nix
@@ -3,7 +3,7 @@
 , kguiaddons, ki18n, kitemmodels, kitemviews, kwindowsystem
 , kio, kcrash, breeze-icons
 , boost, libraw, fftw, eigen, exiv2, libheif, lcms2, gsl, openexr, giflib
-, openjpeg, opencolorio_1, vc, poppler, curl, ilmbase
+, openjpeg, opencolorio_1, vc, poppler, curl, ilmbase, libmypaint, libwebp
 , qtmultimedia, qtx11extras, quazip
 , python3Packages
 
@@ -23,13 +23,13 @@ mkDerivation rec {
     inherit sha256;
   };
 
-  nativeBuildInputs = [ cmake extra-cmake-modules python3Packages.sip_4 makeWrapper ];
+  nativeBuildInputs = [ cmake extra-cmake-modules python3Packages.sip makeWrapper ];
 
   buildInputs = [
     karchive kconfig kwidgetsaddons kcompletion kcoreaddons kguiaddons
     ki18n kitemmodels kitemviews kwindowsystem kio kcrash breeze-icons
     boost libraw fftw eigen exiv2 lcms2 gsl openexr libheif giflib
-    openjpeg opencolorio_1 poppler curl ilmbase
+    openjpeg opencolorio_1 poppler curl ilmbase libmypaint libwebp
     qtmultimedia qtx11extras quazip
     python3Packages.pyqt5
   ] ++ lib.optional stdenv.hostPlatform.isx86 vc;
@@ -37,6 +37,17 @@ mkDerivation rec {
   NIX_CFLAGS_COMPILE = [ "-I${ilmbase.dev}/include/OpenEXR" ]
     ++ lib.optional stdenv.cc.isGNU "-Wno-deprecated-copy";
 
+  # Krita runs custom python scripts in CMake with custom PYTHONPATH which krita determined in their CMake script.
+  # Patch the PYTHONPATH so python scripts can import sip successfully.
+  postPatch = let
+    pythonPath = python3Packages.makePythonPath (with python3Packages; [ sip setuptools ]);
+  in ''
+    substituteInPlace cmake/modules/FindSIP.cmake \
+      --replace 'PYTHONPATH=''${_sip_python_path}' 'PYTHONPATH=${pythonPath}'
+    substituteInPlace cmake/modules/SIPMacros.cmake \
+      --replace 'PYTHONPATH=''${_krita_python_path}' 'PYTHONPATH=${pythonPath}'
+  '';
+
   cmakeFlags = [
     "-DPYQT5_SIP_DIR=${python3Packages.pyqt5}/${python3Packages.python.sitePackages}/PyQt5/bindings"
     "-DPYQT_SIP_DIR_OVERRIDE=${python3Packages.pyqt5}/${python3Packages.python.sitePackages}/PyQt5/bindings"
@@ -52,7 +63,7 @@ mkDerivation rec {
   meta = with lib; {
     description = "A free and open source painting application";
     homepage = "https://krita.org/";
-    maintainers = with maintainers; [ abbradar ];
+    maintainers = with maintainers; [ abbradar sifmelcara ];
     platforms = platforms.linux;
     license = licenses.gpl3Only;
   };