diff --git a/pkgs/by-name/da/darkly-qt5/package.nix b/pkgs/by-name/da/darkly-qt5/package.nix
deleted file mode 100644
index de0113957bd4..000000000000
--- a/pkgs/by-name/da/darkly-qt5/package.nix
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  darkly,
-  libsForQt5,
-}:
-darkly.override { qtPackages = libsForQt5; }
diff --git a/pkgs/by-name/da/darkly/package.nix b/pkgs/by-name/da/darkly/package.nix
index 9a8ddb9f439f..9dad017633cf 100644
--- a/pkgs/by-name/da/darkly/package.nix
+++ b/pkgs/by-name/da/darkly/package.nix
@@ -5,14 +5,11 @@
   cmake,
   ninja,
   kdePackages,
-  qtPackages ? kdePackages,
+  qt6,
   gitUpdater,
 }:
-let
-  qtMajorVersion = lib.versions.major qtPackages.qtbase.version;
-in
 stdenv.mkDerivation (finalAttrs: {
-  pname = "darkly-qt${qtMajorVersion}";
+  pname = "darkly";
   version = "0.5.32";
 
   src = fetchFromGitHub {
@@ -25,34 +22,27 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     cmake
     ninja
-    qtPackages.wrapQtAppsHook
-    qtPackages.extra-cmake-modules
+    qt6.wrapQtAppsHook
+    kdePackages.extra-cmake-modules
   ];
 
-  buildInputs =
-    with qtPackages;
-    [
-      qtbase
-      kconfig
-      kcoreaddons
-      kcmutils
-      kguiaddons
-      ki18n
-      kiconthemes
-      kwindowsystem
-    ]
-    ++ lib.optionals (qtMajorVersion == "5") [
-      kirigami2
-    ]
-    ++ lib.optionals (qtMajorVersion == "6") [
-      kcolorscheme
-      kdecoration
-      kirigami
-    ];
+  buildInputs = with kdePackages; [
+    qtbase
+    kconfig
+    kcoreaddons
+    kcmutils
+    kguiaddons
+    ki18n
+    kiconthemes
+    kwindowsystem
+    kcolorscheme
+    kdecoration
+    kirigami
+  ];
 
-  cmakeFlags = map (v: lib.cmakeBool "BUILD_QT${v}" (v == qtMajorVersion)) [
-    "5"
-    "6"
+  cmakeFlags = [
+    "-DBUILD_QT5=OFF"
+    "-DBUILD_QT6=ON"
   ];
 
   passthru.updateScript = gitUpdater { rev-prefix = "v"; };
@@ -64,8 +54,6 @@ stdenv.mkDerivation (finalAttrs: {
     platforms = lib.platforms.linux;
     license = with lib.licenses; [ gpl2Plus ];
     maintainers = with lib.maintainers; [ pluiedev ];
-  }
-  // lib.optionalAttrs (qtMajorVersion == "6") {
     mainProgram = "darkly-settings6";
   };
 })
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 195bc8c00707..dc839ef65963 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -587,6 +587,7 @@ mapAliases {
   cyber = throw "cyber has been removed, as it does not build with supported Zig versions"; # Added 2025-08-09
   dale = throw "dale has been removed, as it does not build with supported LLVM versions"; # Added 2025-08-10
   daq = throw "'daq' has been removed as it is unmaintained and broken. Snort2 has also been removed, which depended on this"; # Added 2025-05-21
+  darkly-qt5 = throw "'darkly-qt' has been removed due to outdated KF5 dependencies"; # Added 2026-05-01
   daytona-bin = throw "'daytona-bin' has been removed, as it was unmaintained in nixpkgs"; # Added 2025-07-21
   dbench = throw "'dbench' has been removed as it is unmaintained for 14 years and broken"; # Added 2025-05-17
   dbus-sharp-1_0 = throw "'dbus-sharp-1_0' has been removed as it was unmaintained and had no dependents"; # Added 2025-08-25