diff --git a/pkgs/by-name/nc/ncdu/1.nix b/pkgs/by-name/nc/ncdu/1.nix
deleted file mode 100644
index b4f3de7afabf9..0000000000000
--- a/pkgs/by-name/nc/ncdu/1.nix
+++ /dev/null
@@ -1,34 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchurl,
-  pkg-config,
-  ncurses,
-  versionCheckHook,
-}:
-
-stdenv.mkDerivation (finalAttrs: {
-  pname = "ncdu";
-  version = "1.22";
-
-  src = fetchurl {
-    url = "https://dev.yorhel.nl/download/ncdu-${finalAttrs.version}.tar.gz";
-    sha256 = "sha256-CtbAltwE1RIFgRBHYMAbj06X1BkdbJ73llT6PGkaF2s=";
-  };
-
-  nativeBuildInputs = [ pkg-config ];
-
-  buildInputs = [ ncurses ];
-
-  nativeInstallCheckInputs = [ versionCheckHook ];
-  doInstallCheck = true;
-
-  meta = {
-    description = "Disk usage analyzer with an ncurses interface";
-    homepage = "https://dev.yorhel.nl/ncdu";
-    license = lib.licenses.mit;
-    platforms = lib.platforms.all;
-    maintainers = with lib.maintainers; [ pSub ];
-    mainProgram = "ncdu";
-  };
-})
diff --git a/pkgs/by-name/nc/ncdu/package.nix b/pkgs/by-name/nc/ncdu/package.nix
deleted file mode 100644
index ad12df23228e3..0000000000000
--- a/pkgs/by-name/nc/ncdu/package.nix
+++ /dev/null
@@ -1,59 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchurl,
-  ncurses,
-  pkg-config,
-  zig_0_15,
-  zstd,
-  installShellFiles,
-  versionCheckHook,
-  pie ? stdenv.hostPlatform.isDarwin,
-}:
-
-stdenv.mkDerivation (finalAttrs: {
-  pname = "ncdu";
-  version = "2.9.2";
-
-  src = fetchurl {
-    url = "https://dev.yorhel.nl/download/ncdu-${finalAttrs.version}.tar.gz";
-    hash = "sha256-6RE1KBy2ZWnyykwLrCdyRpkeflJSTAyoy6PeXI6Bzsk=";
-  };
-
-  nativeBuildInputs = [
-    zig_0_15
-    installShellFiles
-    pkg-config
-  ];
-
-  buildInputs = [
-    ncurses
-    zstd
-  ];
-
-  zigBuildFlags = lib.optional pie "-Dpie=true";
-
-  postInstall = ''
-    installManPage ncdu.1
-  '';
-
-  nativeInstallCheckInputs = [ versionCheckHook ];
-  doInstallCheck = true;
-
-  passthru.updateScript = ./update.sh;
-
-  meta = {
-    homepage = "https://dev.yorhel.nl/ncdu";
-    description = "Disk usage analyzer with an ncurses interface";
-    changelog = "https://dev.yorhel.nl/ncdu/changes2";
-    license = lib.licenses.mit;
-    maintainers = with lib.maintainers; [
-      pSub
-      rodrgz
-      defelo
-      ryan4yin
-    ];
-    inherit (zig_0_15.meta) platforms;
-    mainProgram = "ncdu";
-  };
-})
diff --git a/pkgs/by-name/nc/ncdu/update.sh b/pkgs/by-name/nc/ncdu/update.sh
deleted file mode 100755
index 430c83649ac35..0000000000000
--- a/pkgs/by-name/nc/ncdu/update.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i bash -p common-updater-scripts coreutils gnused nix-update
-
-version=$(list-git-tags --url=https://g.blicky.net/ncdu.git | tail -1 | sed 's/^v//')
-nix-update --version="$version" ncdu
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index b31726dc25188..2de711a93babc 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1565,7 +1565,8 @@ mapAliases {
   nanoblogger = throw "nanoblogger has been removed as upstream stopped developement in 2013"; # Added 2025-09-10
   nasc = throw "'nasc' has been removed as it was unmaintained and depends on deprecated webkitgtk_4_0"; # Added 2025-10-09
   nats-streaming-server = throw "'nats-streaming-server' has been removed as critical bug fixes and security fixes will no longer be performed as of June of 2023"; # Added 2025-10-13
-  ncdu_2 = throw "'ncdu_2' has been renamed to/replaced by 'ncdu'"; # Converted to throw 2025-10-27
+  ncdu = throw "'ncdu' has been removed as it is unmaintained upstream"; # Converted to throw 2026-06-29
+  ncdu_2 = throw "'ncdu_2' has been renamed to/replaced by 'ncdu', which has been removed"; # Converted to throw 2025-10-27
   ndjbdns = throw "'ndjbdns' has been removed as it has been pulled upstream"; # Added 2025-12-18
   near-cli = throw "'near-cli' has been removed as upstream has deprecated it and archived the source code repo"; # Added 2025-11-10
   neardal = throw "neardal has been removed because it has been marked as broken since at least November 2024."; # Added 2025-09-29
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index bff44351dd149..bc288c7679bc1 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -9241,8 +9241,6 @@ with pkgs;
     enableGL = false;
   };
 
-  ncdu_1 = callPackage ../by-name/nc/ncdu/1.nix { };
-
   notmuch = callPackage ../applications/networking/mailreaders/notmuch {
     pythonPackages = python3Packages;
   };