diff --git a/pkgs/by-name/bl/blender/package.nix b/pkgs/by-name/bl/blender/package.nix
index 8270bc2810e2..92107dfe9cff 100644
--- a/pkgs/by-name/bl/blender/package.nix
+++ b/pkgs/by-name/bl/blender/package.nix
@@ -9,7 +9,6 @@
   callPackage,
   ceres-solver,
   cmake,
-  colladaSupport ? true,
   config,
   cudaPackages,
   cudaSupport ? config.cudaSupport,
@@ -54,7 +53,6 @@
   nix-update-script,
   openUsdSupport ? !stdenv.hostPlatform.isDarwin,
   openal,
-  opencollada-blender,
   opencolorio,
   openexr,
   openimagedenoise,
@@ -185,7 +183,6 @@ stdenv'.mkDerivation (finalAttrs: {
     (lib.cmakeBool "WITH_INSTALL_PORTABLE" false)
     (lib.cmakeBool "WITH_JACK" jackaudioSupport)
     (lib.cmakeBool "WITH_LIBS_PRECOMPILED" false)
-    (lib.cmakeBool "WITH_OPENCOLLADA" colladaSupport)
     (lib.cmakeBool "WITH_OPENIMAGEDENOISE" openImageDenoiseSupport)
     (lib.cmakeBool "WITH_PIPEWIRE" false)
     (lib.cmakeBool "WITH_PULSEAUDIO" false)
@@ -325,7 +322,6 @@ stdenv'.mkDerivation (finalAttrs: {
     wayland
     wayland-protocols
   ]
-  ++ lib.optional colladaSupport opencollada-blender
   ++ lib.optional jackaudioSupport libjack2
   ++ lib.optional spaceNavSupport libspnav
   ++ lib.optionals vulkanSupport [
diff --git a/pkgs/by-name/op/opencollada-blender/cmake4-compat.patch b/pkgs/by-name/op/opencollada-blender/cmake4-compat.patch
deleted file mode 100644
index c586a589534a..000000000000
--- a/pkgs/by-name/op/opencollada-blender/cmake4-compat.patch
+++ /dev/null
@@ -1,26 +0,0 @@
-From f036950f1ccc3ebdfe2fdc0a52d35a4620252901 Mon Sep 17 00:00:00 2001
-From: Grimmauld <Grimmauld@grimmauld.de>
-Date: Sat, 27 Sep 2025 11:43:21 +0200
-Subject: [PATCH] Build: update cmake minimum version to 3.10
-
-cmake ABI compatibility with cmake <3.5 has been removed in cmake 4.
-Compatibility with cmake <3.10 is deprecated and soon to be removed.
-Thus set 3.10 minimum version. This is available in the vast majority
-of current linux distributions, as well as other platforms.
----
- CMakeLists.txt | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 95abbe213..2d14b2552 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -18,7 +18,7 @@ if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
- 	endif()
- endif()
- 
--cmake_minimum_required(VERSION 2.6)
-+cmake_minimum_required(VERSION 3.10)
- 
- 
- #-----------------------------------------------------------------------------
diff --git a/pkgs/by-name/op/opencollada-blender/package.nix b/pkgs/by-name/op/opencollada-blender/package.nix
deleted file mode 100644
index 01042195cd9a..000000000000
--- a/pkgs/by-name/op/opencollada-blender/package.nix
+++ /dev/null
@@ -1,51 +0,0 @@
-{
-  cmake,
-  dos2unix,
-  fetchFromGitHub,
-  lib,
-  libxml2,
-  pcre,
-  pkg-config,
-  stdenv,
-}:
-
-stdenv.mkDerivation {
-  pname = "opencollada";
-  version = "0-unstable-2025-01-30";
-
-  src = fetchFromGitHub {
-    owner = "aras-p";
-    repo = "OpenCOLLADA";
-    rev = "4526eb8aaa6462c71fbedd23103976c151a01c50";
-    sha256 = "sha256-ctr+GjDzxOJxBfaMwjwayPkAOcF+FMsP1X72QCOwvTY=";
-  };
-
-  # Fix freaky dos-style CLRF things
-  prePatch = ''
-    dos2unix CMakeLists.txt
-  '';
-
-  patches = [
-    # https://github.com/aras-p/OpenCOLLADA/pull/1
-    ./cmake4-compat.patch
-  ];
-
-  nativeBuildInputs = [
-    cmake
-    pkg-config
-    dos2unix
-  ];
-
-  propagatedBuildInputs = [
-    libxml2
-    pcre
-  ];
-
-  meta = {
-    description = "Library for handling the COLLADA file format";
-    homepage = "https://github.com/aras-p/OpenCOLLADA";
-    maintainers = [ lib.maintainers.amarshall ];
-    platforms = lib.platforms.unix;
-    license = lib.licenses.mit;
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 7ff43bb28569..31ed20afd89d 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1530,6 +1530,7 @@ mapAliases {
   openbabel3 = openbabel; # Added 2025-09-17
   openbsdCross = throw "'openbsdCross' has been renamed to/replaced by 'openbsd'"; # Converted to throw 2025-10-27
   opencl-clang = throw "opencl-clang has been integrated into intel-graphics-compiler"; # Added 2025-09-10
+  opencollada-blender = throw "opencollada-blender has been removed, as it is unmaintained upstream"; # Added 2026-04-26
   opencolorio_1 = throw "'opencolorio_1' has been removed. Use opencolorio instead"; # Added 2026-01-03
   openconnect_gnutls = throw "'openconnect_gnutls' has been renamed to/replaced by 'openconnect'"; # Converted to throw 2025-10-27
   openexr_3 = throw "'openexr_3' has been renamed to/replaced by 'openexr'"; # Converted to throw 2025-10-27