diff --git a/pkgs/applications/audio/soundkonverter/default.nix b/pkgs/applications/audio/soundkonverter/default.nix
deleted file mode 100644
index 60e175984780..000000000000
--- a/pkgs/applications/audio/soundkonverter/default.nix
+++ /dev/null
@@ -1,174 +0,0 @@
-# currently needs to be installed into an environment and needs a `kbuildsycoca5` run afterwards for plugin discovery
-{
-  mkDerivation,
-  fetchFromGitHub,
-  fetchpatch,
-  lib,
-  makeWrapper,
-  cmake,
-  extra-cmake-modules,
-  pkg-config,
-  libkcddb,
-  kconfig,
-  kconfigwidgets,
-  ki18n,
-  kdelibs4support,
-  kio,
-  solid,
-  kwidgetsaddons,
-  kxmlgui,
-  qtbase,
-  phonon,
-  taglib_1,
-  # optional backends
-  withCD ? true,
-  cdparanoia,
-  withFlac ? true,
-  flac,
-  withMidi ? true,
-  fluidsynth,
-  timidity,
-  withSpeex ? false,
-  speex,
-  withVorbis ? true,
-  vorbis-tools,
-  vorbisgain,
-  withMp3 ? true,
-  lame,
-  mp3gain,
-  withAac ? true,
-  faad2,
-  aacgain,
-  withUnfreeAac ? false,
-  faac,
-  withFfmpeg ? true,
-  ffmpeg-full,
-  withMplayer ? false,
-  mplayer,
-  withSox ? true,
-  sox,
-  withOpus ? true,
-  opusTools,
-  withTwolame ? false,
-  twolame,
-  withApe ? false,
-  monkeysAudio,
-  withWavpack ? false,
-  wavpack,
-}:
-
-assert withAac -> withFfmpeg || withUnfreeAac;
-assert withUnfreeAac -> withAac;
-
-let
-  runtimeDeps =
-    [ ]
-    ++ lib.optional withCD cdparanoia
-    ++ lib.optional withFlac flac
-    ++ lib.optional withSpeex speex
-    ++ lib.optional withFfmpeg ffmpeg-full
-    ++ lib.optional withMplayer mplayer
-    ++ lib.optional withSox sox
-    ++ lib.optional withOpus opusTools
-    ++ lib.optional withTwolame twolame
-    ++ lib.optional withApe monkeysAudio
-    ++ lib.optional withWavpack wavpack
-    ++ lib.optional withUnfreeAac faac
-    ++ lib.optionals withMidi [
-      fluidsynth
-      timidity
-    ]
-    ++ lib.optionals withVorbis [
-      vorbis-tools
-      vorbisgain
-    ]
-    ++ lib.optionals withMp3 [
-      lame
-      mp3gain
-    ]
-    ++ lib.optionals withAac [
-      faad2
-      aacgain
-    ];
-
-in
-mkDerivation rec {
-  pname = "soundkonverter";
-  version = "3.0.1";
-  src = fetchFromGitHub {
-    owner = "dfaust";
-    repo = "soundkonverter";
-    rev = "v" + version;
-    sha256 = "1g2khdsjmsi4zzynkq8chd11cbdhjzmi37r9jhpal0b730nq9x7l";
-  };
-  patches = [
-    # already merged into master, so it can go during the next release
-    (fetchpatch {
-      url = "https://patch-diff.githubusercontent.com/raw/dfaust/soundkonverter/pull/87.patch";
-      sha256 = "sha256-XIpD4ZMTZVcu+F27OtpRy51H+uQgpd5l22IZ6XsD64w=";
-      name = "soundkonverter_taglib.patch";
-      stripLen = 1;
-    })
-  ];
-
-  nativeBuildInputs = [
-    cmake
-    extra-cmake-modules
-    pkg-config
-    kdelibs4support
-    makeWrapper
-  ];
-  propagatedBuildInputs = [
-    libkcddb
-    kconfig
-    kconfigwidgets
-    ki18n
-    kdelibs4support
-    kio
-    solid
-    kwidgetsaddons
-    kxmlgui
-    qtbase
-    phonon
-  ];
-  buildInputs = [ taglib_1 ] ++ runtimeDeps;
-  # encoder plugins go to ${out}/lib so they're found by kbuildsycoca5
-  cmakeFlags = [ "-DCMAKE_INSTALL_PREFIX=$out" ];
-  sourceRoot = "${src.name}/src";
-  # add runt-time deps to PATH
-  postInstall = ''
-    wrapProgram $out/bin/soundkonverter --prefix PATH : ${lib.makeBinPath runtimeDeps}
-  '';
-  meta = {
-    homepage = "https://github.com/dfaust/soundkonverter";
-    license = lib.licenses.gpl2;
-    maintainers = [ lib.maintainers.schmittlauch ];
-    description = "Audio file converter, CD ripper and Replay Gain tool";
-    mainProgram = "soundkonverter";
-    longDescription = ''
-      soundKonverter is a frontend to various audio converters.
-
-      The key features are:
-      - Audio file conversion
-      - Replay Gain calculation
-      - CD ripping
-
-      soundKonverter supports reading and writing tags and covers for many formats, so they are preserved when converting files.
-
-      It is extendable by plugins and supports many backends including:
-
-      - Audio file conversion
-        Backends: faac, faad, ffmpeg, flac, lame, mplayer, neroaac, timidity, fluidsynth, vorbistools, opustools, sox, twolame,
-        flake, mac, shorten, wavpack and speex
-        Formats: ogg vorbis, mp3, flac, wma, aac, ac3, opus, alac, mp2, als, amr nb, amr wb, ape, speex, m4a, mp1, musepack shorten,
-        tta, wavpack, ra, midi, mod, 3gp, rm, avi, mkv, ogv, mpeg, mov, mp4, flv, wmv and rv
-
-      - Replay Gain calculation
-        Backends: aacgain, metaflac, mp3gain, vorbisgain, wvgain, mpcgain
-        Formats: aac, mp3, flac, ogg vorbis, wavpack, musepack
-
-      - CD ripping
-        Backends: cdparanoia
-    '';
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 80f4186a94bc..5c27c1a617bb 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1890,6 +1890,7 @@ mapAliases {
   snort2 = throw "snort2 has been removed as it is deprecated and unmaintained by upstream. Consider using snort (snort3) package instead."; # 2025-05-21
   soldat-unstable = opensoldat; # Added 2022-07-02
   soulseekqt = throw "'soulseekqt' has been removed due to lack of maintenance in Nixpkgs in a long time. Consider using 'nicotine-plus' or 'slskd' instead."; # Added 2025-06-07
+  soundkonverter = throw "'soundkonverter' has been dropped as it depends on KDE Gear 5, and is unmaintained"; # Added 2025-08-20
   soundOfSorting = sound-of-sorting; # Added 2023-07-07
   SP800-90B_EntropyAssessment = sp800-90b-entropyassessment; # Added on 2024-06-12
   SPAdes = spades; # Added 2024-06-12
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3d003af18b1a..4e1cd9c6dd66 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4226,8 +4226,6 @@ with pkgs;
 
   spoof-mac = python3Packages.callPackage ../tools/networking/spoof-mac { };
 
-  soundkonverter = libsForQt5.soundkonverter;
-
   stm32loader = with python3Packages; toPythonApplication stm32loader;
 
   solc-select = with python3Packages; toPythonApplication solc-select;
diff --git a/pkgs/top-level/qt5-packages.nix b/pkgs/top-level/qt5-packages.nix
index 4abfa6f877c4..5ae8023b6b20 100644
--- a/pkgs/top-level/qt5-packages.nix
+++ b/pkgs/top-level/qt5-packages.nix
@@ -303,8 +303,6 @@ makeScopeWithSplicing' {
 
         signond = callPackage ../development/libraries/signond { };
 
-        soundkonverter = callPackage ../applications/audio/soundkonverter { };
-
         timed = callPackage ../applications/system/timed { };
 
         xp-pen-deco-01-v2-driver = callPackage ../os-specific/linux/xp-pen-drivers/deco-01-v2 { };