diff --git a/pkgs/applications/video/kmplayer/default.nix b/pkgs/applications/video/kmplayer/default.nix
deleted file mode 100644
index 0c3d3d74e8df..000000000000
--- a/pkgs/applications/video/kmplayer/default.nix
+++ /dev/null
@@ -1,81 +0,0 @@
-{
-  mkDerivation,
-  lib,
-  fetchurl,
-  extra-cmake-modules,
-  makeWrapper,
-  libpthreadstubs,
-  libXdmcp,
-  qtsvg,
-  qtx11extras,
-  ki18n,
-  kdelibs4support,
-  kio,
-  kmediaplayer,
-  kwidgetsaddons,
-  phonon,
-  cairo,
-  mplayer,
-}:
-
-mkDerivation rec {
-  majorMinorVersion = "0.12";
-  patchVersion = "0b";
-  version = "${majorMinorVersion}.${patchVersion}";
-  pname = "kmplayer";
-
-  src = fetchurl {
-    url = "mirror://kde/stable/kmplayer/${majorMinorVersion}/kmplayer-${version}.tar.bz2";
-    sha256 = "0wzdxym4fc83wvqyhcwid65yv59a2wvp1lq303cn124mpnlwx62y";
-  };
-
-  patches = [
-    ./kmplayer_part-plugin_metadata.patch # Qt 5.9 doesn't like an empty string for the optional "FILE" argument of "Q_PLUGIN_METADATA"
-    ./no-docs.patch # Don't build docs due to errors (kdelibs4support propagates kdoctools)
-  ];
-
-  postPatch = ''
-    sed -i src/kmplayer.desktop \
-      -e "s,^Exec.*,Exec=$out/bin/kmplayer -qwindowtitle %c %i %U,"
-  '';
-
-  # required for kf5auth to work correctly
-  cmakeFlags = [ "-DCMAKE_POLICY_DEFAULT_CMP0012=NEW" ];
-
-  nativeBuildInputs = [
-    extra-cmake-modules
-    makeWrapper
-  ];
-
-  buildInputs = [
-    libpthreadstubs
-    libXdmcp
-    qtsvg
-    qtx11extras
-    ki18n
-    kdelibs4support
-    kio
-    kmediaplayer
-    kwidgetsaddons
-    phonon
-    cairo
-  ];
-
-  postInstall = ''
-    wrapProgram $out/bin/kmplayer --suffix PATH : ${mplayer}/bin
-  '';
-
-  meta = with lib; {
-    description = "MPlayer front-end for KDE";
-    license = with licenses; [
-      gpl2Plus
-      lgpl2Plus
-      fdl12Plus
-    ];
-    homepage = "https://kmplayer.kde.org/";
-    maintainers = with maintainers; [
-      sander
-      zraexy
-    ];
-  };
-}
diff --git a/pkgs/applications/video/kmplayer/kmplayer_part-plugin_metadata.patch b/pkgs/applications/video/kmplayer/kmplayer_part-plugin_metadata.patch
deleted file mode 100644
index 9b6652b0be58..000000000000
--- a/pkgs/applications/video/kmplayer/kmplayer_part-plugin_metadata.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- a/src/kmplayer_part.h
-+++ b/src/kmplayer_part.h
-@@ -36,7 +36,7 @@
- 
- class KMPlayerFactory : public KPluginFactory {
-     Q_OBJECT
--    Q_PLUGIN_METADATA(IID "org.kde.KPluginFactory" FILE "")
-+    Q_PLUGIN_METADATA(IID "org.kde.KPluginFactory")
-     Q_INTERFACES(KPluginFactory)
- public:
-     KMPlayerFactory();
diff --git a/pkgs/applications/video/kmplayer/no-docs.patch b/pkgs/applications/video/kmplayer/no-docs.patch
deleted file mode 100644
index c93453f908c9..000000000000
--- a/pkgs/applications/video/kmplayer/no-docs.patch
+++ /dev/null
@@ -1,12 +0,0 @@
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -79,9 +79,6 @@
- 
- add_subdirectory(src)
- add_subdirectory(icons)
--if (IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/doc" AND KF5DocTools_VERSION)
--  add_subdirectory(doc)
--endif(KF5DocTools_VERSION)
- add_subdirectory(data)
- 
- if (IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/po")
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index c5c80f817179..97672f03762d 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1240,6 +1240,7 @@ mapAliases {
   kibana = kibana7;
   kio-admin = makePlasma5Throw "kio-admin"; # Added 2023-03-18
   kiwitalk = throw "KiwiTalk has been removed because the upstream has been deprecated at the request of Kakao and it's now obsolete."; # Added 2024-10-10
+  kmplayer = throw "'kmplayer' has been removed, as it is unmaintained upstream"; # Added 2025-08-30
   kodiGBM = kodi-gbm;
   kodiPlain = kodi;
   kodiPlainWayland = kodi-wayland;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index dc54e40067f5..6ef438ef7f4a 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12169,8 +12169,6 @@ with pkgs;
     llvmPackages = llvmPackages_13;
   };
 
-  kmplayer = libsForQt5.callPackage ../applications/video/kmplayer { };
-
   alkimia = kdePackages.callPackage ../development/libraries/alkimia { };
   kmymoney = kdePackages.callPackage ../applications/office/kmymoney { };