diff --git a/nixos/modules/config/xdg/portals/lxqt.nix b/nixos/modules/config/xdg/portals/lxqt.nix
index 423fcae1b2b1..56e709f1b91e 100644
--- a/nixos/modules/config/xdg/portals/lxqt.nix
+++ b/nixos/modules/config/xdg/portals/lxqt.nix
@@ -29,7 +29,6 @@ in
         [
           pkgs.libsForQt5.qtstyleplugin-kvantum
           pkgs.breeze-qt5
-          pkgs.qtcurve
         ];
       '';
       description = ''
diff --git a/pkgs/data/themes/qtcurve/default.nix b/pkgs/data/themes/qtcurve/default.nix
deleted file mode 100644
index 86b2590685de..000000000000
--- a/pkgs/data/themes/qtcurve/default.nix
+++ /dev/null
@@ -1,112 +0,0 @@
-{
-  lib,
-  fetchFromGitHub,
-  cmake,
-  extra-cmake-modules,
-  pkg-config,
-  mkDerivation,
-  gtk2Support ? true,
-  gtk2,
-  qtbase,
-  qtsvg,
-  qtx11extras, # Toolkit dependencies
-  karchive,
-  kconfig,
-  kconfigwidgets,
-  kio,
-  frameworkintegration,
-  kguiaddons,
-  ki18n,
-  kwindowsystem,
-  kdelibs4support,
-  kiconthemes,
-  libpthread-stubs,
-  pcre,
-  libxdmcp,
-  libx11,
-  libxau, # X11 dependencies
-  fetchpatch,
-}:
-
-mkDerivation rec {
-  pname = "qtcurve";
-  version = "1.9.1";
-  src = fetchFromGitHub {
-    owner = "KDE";
-    repo = "qtcurve";
-    rev = version;
-    sha256 = "XP9VTeiVIiMm5mkXapCKWxfcvaYCkhY3S5RXZNR3oWo=";
-  };
-
-  patches = [
-    # Fix build with CMake 4
-    (fetchpatch {
-      url = "https://github.com/KDE/qtcurve/commit/d2c84577505641e647fbb64bce825b3e0a4129f5.patch";
-      sha256 = "sha256-WBmzlVDxRNXZmi6c03cR1MuIr+hBaeFXgNLzhsv0bZo=";
-    })
-    # Remove unnecessary constexpr, this is not allowed in C++14
-    (fetchpatch {
-      url = "https://github.com/KDE/qtcurve/commit/ee2228ea2f18ac5da9b434ee6089381df815aa94.patch";
-      sha256 = "1vz5frsrsps93awn84gk8d7injrqfcyhc1rji6s0gsgsp5z9sl34";
-    })
-    # Fix build with Qt5.15
-    (fetchpatch {
-      url = "https://github.com/KDE/qtcurve/commit/44e2a35ebb164dcab0bad1a9158b1219a3ff6504.patch";
-      sha256 = "5I2fTxKRJX0cJcyUvYHWZx369FKk6ti9Se7AfYmB9ek=";
-    })
-  ];
-
-  nativeBuildInputs = [
-    cmake
-    extra-cmake-modules
-    pkg-config
-  ];
-
-  buildInputs = [
-    qtbase
-    qtsvg
-    qtx11extras
-    karchive
-    kconfig
-    kconfigwidgets
-    kio
-    kiconthemes
-    kguiaddons
-    ki18n
-    kwindowsystem
-    kdelibs4support
-    frameworkintegration
-    libpthread-stubs
-    pcre
-    libxdmcp
-    libx11
-    libxau
-  ]
-  ++ lib.optional gtk2Support gtk2;
-
-  preConfigure = ''
-    for i in qt5/CMakeLists.txt qt5/config/CMakeLists.txt
-    do
-      substituteInPlace $i \
-        --replace "{_Qt5_PLUGIN_INSTALL_DIR}" "{KDE_INSTALL_QTPLUGINDIR}"
-    done
-    substituteInPlace CMakeLists.txt \
-      --replace \$\{GTK2_PREFIX\} $out
-    substituteInPlace gtk2/style/CMakeLists.txt \
-      --replace \$\{GTK2_LIBDIR\} $out/lib
-    patchShebangs tools/gen-version.sh
-  '';
-
-  configureFlags = [
-    "-DENABLE_GTK2=${if gtk2Support then "ON" else "OFF"}"
-    "-DENABLE_QT4=OFF"
-  ];
-
-  meta = {
-    homepage = "https://github.com/QtCurve/qtcurve";
-    description = "Widget styles for Qt5/Plasma 5 and gtk2";
-    platforms = lib.platforms.linux;
-    license = lib.licenses.lgpl21Plus;
-    maintainers = [ ];
-  };
-}
diff --git a/pkgs/top-level/qt5-packages.nix b/pkgs/top-level/qt5-packages.nix
index 63b241312cfe..d5f5a5d3817f 100644
--- a/pkgs/top-level/qt5-packages.nix
+++ b/pkgs/top-level/qt5-packages.nix
@@ -78,8 +78,6 @@ makeScopeWithSplicing' {
 
         grantlee = callPackage ../development/libraries/grantlee/5 { };
 
-        qtcurve = callPackage ../data/themes/qtcurve { };
-
         herqq = callPackage ../development/libraries/herqq { };
 
         kdb = callPackage ../development/libraries/kdb { };