diff --git a/pkgs/development/tools/analysis/massif-visualizer/cmake-minimum-required.patch b/pkgs/development/tools/analysis/massif-visualizer/cmake-minimum-required.patch
deleted file mode 100644
index 0f7d6e87b040..000000000000
--- a/pkgs/development/tools/analysis/massif-visualizer/cmake-minimum-required.patch
+++ /dev/null
@@ -1,10 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index d7067dc..337c4ea 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -1,4 +1,4 @@
--cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)
-+cmake_minimum_required(VERSION 3.10)
- project(massif-visualizer)
- 
- set(QT_MIN_VERSION "5.2.0")
diff --git a/pkgs/development/tools/analysis/massif-visualizer/default.nix b/pkgs/development/tools/analysis/massif-visualizer/default.nix
deleted file mode 100644
index 0b1c5009c972..000000000000
--- a/pkgs/development/tools/analysis/massif-visualizer/default.nix
+++ /dev/null
@@ -1,57 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchurl,
-  extra-cmake-modules,
-  shared-mime-info,
-  wrapQtAppsHook,
-  qtsvg,
-  qtxmlpatterns,
-  karchive,
-  kconfig,
-  kcoreaddons,
-  kparts,
-  kio,
-  ki18n,
-  kdiagram,
-  kgraphviewer,
-}:
-
-stdenv.mkDerivation rec {
-  pname = "massif-visualizer";
-  version = "0.7.0";
-
-  src = fetchurl {
-    url = "mirror://kde/stable/massif-visualizer/${version}/src/${pname}-${version}.tar.xz";
-    sha256 = "0v8z6r9gngzckvqyxjm9kp7hilwfqibyk2f9vag9l98ar0iwr97q";
-  };
-
-  patches = [ ./cmake-minimum-required.patch ];
-
-  nativeBuildInputs = [
-    extra-cmake-modules
-    shared-mime-info
-    wrapQtAppsHook
-  ];
-
-  buildInputs = [
-    qtsvg
-    qtxmlpatterns
-    karchive
-    kconfig
-    kcoreaddons
-    kparts
-    kio
-    ki18n
-    kdiagram
-    kgraphviewer
-  ];
-
-  meta = {
-    description = "Tool that visualizes massif data generated by valgrind";
-    mainProgram = "massif-visualizer";
-    license = lib.licenses.gpl2;
-    platforms = lib.platforms.linux;
-    maintainers = with lib.maintainers; [ zraexy ];
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 835fab676c5b..5675af9bc26c 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1366,6 +1366,7 @@ mapAliases {
   marwaita-peppermint = throw "'marwaita-peppermint' has been renamed to/replaced by 'marwaita-red'"; # Converted to throw 2025-10-27
   marwaita-pop_os = throw "'marwaita-pop_os' has been renamed to/replaced by 'marwaita-yellow'"; # Converted to throw 2025-10-27
   marwaita-ubuntu = throw "'marwaita-ubuntu' has been renamed to/replaced by 'marwaita-orange'"; # Converted to throw 2025-10-27
+  massif-visualizer = throw "'massif-visualizer' has been removed due to outdated KF5 dependencies."; # Added 2026-05-01
   mastodon-bot = throw "'mastodon-bot' has been removed because it was archived by upstream in 2021."; # Added 2025-11-07
   material-kwin-decoration = throw "'material-kwin-decoration' has been removed, as it is only compatible with Plasma 5, which is EOL"; # Added 2025-08-20
   mathlibtools = throw "mathlibtools has been removed as it was archived upstream in 2023"; # Added 2025-07-09
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index c3ed1401a4c1..838d83f08ee9 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5698,8 +5698,6 @@ with pkgs;
 
   lit = with python3Packages; toPythonApplication lit;
 
-  massif-visualizer = libsForQt5.callPackage ../development/tools/analysis/massif-visualizer { };
-
   maven3 = maven;
   inherit (maven) buildMaven;