diff --git a/pkgs/by-name/bu/bullet-roboschool/gwen-narrowing.patch b/pkgs/by-name/bu/bullet-roboschool/gwen-narrowing.patch
deleted file mode 100644
index c6c06325dae0..000000000000
--- a/pkgs/by-name/bu/bullet-roboschool/gwen-narrowing.patch
+++ /dev/null
@@ -1,22 +0,0 @@
-commit a5d3497577c78b03c05c69d17df972fa9fb54f53
-Author: Linus Heckemann <git@sphalerite.org>
-Date:   Fri Jan 5 23:57:09 2018 +0100
-
-    Add -Wno-narrowing to GWEN's CMakeLists
-    
-    This avoids the compilation issue that occurs on aarch64 with gcc6.
-    (nixpkgs-specific patch)
-
-diff --git a/examples/ThirdPartyLibs/Gwen/CMakeLists.txt b/examples/ThirdPartyLibs/Gwen/CMakeLists.txt
-index 82fa0ffba..26c4bbd37 100644
---- a/examples/ThirdPartyLibs/Gwen/CMakeLists.txt
-+++ b/examples/ThirdPartyLibs/Gwen/CMakeLists.txt
-@@ -15,7 +15,7 @@ IF(NOT WIN32 AND NOT APPLE)
-         ADD_DEFINITIONS("-DDYNAMIC_LOAD_X11_FUNCTIONS=1")
- ENDIF()
- 
--ADD_DEFINITIONS( -DGLEW_STATIC -DGWEN_COMPILE_STATIC -D_HAS_EXCEPTIONS=0 -D_STATIC_CPPLIB )
-+ADD_DEFINITIONS( -DGLEW_STATIC -DGWEN_COMPILE_STATIC -D_HAS_EXCEPTIONS=0 -D_STATIC_CPPLIB -Wno-narrowing )
- 
- FILE(GLOB gwen_SRCS "*.cpp" "Controls/*.cpp" "Controls/Dialog/*.cpp" "Controls/Dialogs/*.cpp" "Controls/Layout/*.cpp" "Controls/Property/*.cpp" "Input/*.cpp" "Platforms/*.cpp" "Renderers/*.cpp" "Skins/*.cpp")
- FILE(GLOB gwen_HDRS "*.h" "Controls/*.h" "Controls/Dialog/*.h" "Controls/Dialogs/*.h" "Controls/Layout/*.h" "Controls/Property/*.h" "Input/*.h" "Platforms/*.h" "Renderers/*.h" "Skins/*.h")
diff --git a/pkgs/by-name/bu/bullet-roboschool/package.nix b/pkgs/by-name/bu/bullet-roboschool/package.nix
deleted file mode 100644
index 80492e9f54ac..000000000000
--- a/pkgs/by-name/bu/bullet-roboschool/package.nix
+++ /dev/null
@@ -1,58 +0,0 @@
-{
-  lib,
-  stdenv,
-  fetchFromGitHub,
-  cmake,
-  libGLU,
-  libGL,
-  libglut,
-}:
-
-stdenv.mkDerivation {
-  pname = "bullet";
-  version = "2019-03-27";
-
-  src = fetchFromGitHub {
-    owner = "olegklimov";
-    repo = "bullet3";
-    # roboschool needs the HEAD of a specific branch of this fork, see
-    # https://github.com/openai/roboschool/issues/126#issuecomment-421643980
-    # https://github.com/openai/roboschool/pull/62
-    # https://github.com/openai/roboschool/issues/124
-    rev = "3687507ddc04a15de2c5db1e349ada3f2b34b3d6";
-    sha256 = "1wd7vj9136dl7lfb8ll0rc2fdl723y3ls9ipp7657yfl2xrqhvkb";
-  };
-
-  nativeBuildInputs = [ cmake ];
-  buildInputs = [
-    libGLU
-    libGL
-    libglut
-  ];
-
-  patches = [ ./gwen-narrowing.patch ];
-
-  cmakeFlags = [
-    "-DBUILD_SHARED_LIBS=ON"
-    "-DBUILD_CPU_DEMOS=OFF"
-    "-DINSTALL_EXTRA_LIBS=ON"
-  ]
-  ++ lib.optionals stdenv.hostPlatform.isDarwin [
-    "-DBUILD_BULLET2_DEMOS=OFF"
-    "-DBUILD_UNIT_TESTS=OFF"
-  ];
-
-  meta = with lib; {
-    description = "Professional free 3D Game Multiphysics Library";
-    longDescription = ''
-      Bullet 3D Game Multiphysics Library provides state of the art collision
-      detection, soft body and rigid body dynamics.
-    '';
-    homepage = "http://bulletphysics.org";
-    license = licenses.zlib;
-    platforms = platforms.unix;
-    # /tmp/nix-build-bullet-2019-03-27.drv-0/source/src/Bullet3Common/b3Vector3.h:297:7: error: argument value 10880 is outside the valid range [0, 255] [-Wargument-outside-range]
-    #                 y = b3_splat_ps(y, 0x80);
-    broken = (stdenv.hostPlatform.isDarwin && stdenv.hostPlatform.isx86_64);
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 3a0be3791863..28f3869e7c09 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -365,6 +365,7 @@ mapAliases {
   buildGo123Module = throw "Go 1.23 is end-of-life, and 'buildGo123Module' has been removed. Please use a newer builder version."; # Added 2025-08-13
   buildPlatform = warnAlias "'buildPlatform' has been renamed to/replaced by 'stdenv.buildPlatform'" stdenv.buildPlatform; # Converted to warning 2025-10-28
   buildXenPackage = throw "'buildXenPackage' has been removed as a custom Xen build can now be achieved by simply overriding 'xen'."; # Added 2025-05-12
+  bullet-roboschool = throw "'bullet-roboschool' has been removed as its build was broken and it was deprecated with its last update in 2019."; # Added 2025-11-15
   bwidget = throw "'bwidget' has been renamed to/replaced by 'tclPackages.bwidget'"; # Converted to throw 2025-10-27
   bzrtp = throw "'bzrtp' has been moved to 'linphonePackages.bzrtp'"; # Added 2025-09-20
   calculix = throw "'calculix' has been renamed to/replaced by 'calculix-ccx'"; # Converted to throw 2025-10-27