diff --git a/pkgs/by-name/et/eternity/package.nix b/pkgs/by-name/et/eternity/package.nix
index 94f93d167746..03df7f493a34 100644
--- a/pkgs/by-name/et/eternity/package.nix
+++ b/pkgs/by-name/et/eternity/package.nix
@@ -8,43 +8,66 @@
   SDL2_net,
   fetchFromGitHub,
   makeWrapper,
+  zlib,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "eternity-engine";
-  version = "4.02.00";
+  version = "4.05.04";
   src = fetchFromGitHub {
     owner = "team-eternity";
     repo = "eternity";
-    tag = version;
-    sha256 = "0dlz7axbiw003bgwk2hl43w8r2bwnxhi042i1xwdiwaja0cpnf5y";
+    tag = finalAttrs.version;
+    hash = "sha256-uUQYTI6qDMMtL0Zc82wr3hOPayvAj5kH8CuexAKFE6I=";
     fetchSubmodules = true;
   };
 
+  postPatch =
+    # CMake 4 compatibility
+    ''
+      substituteInPlace acsvm/CMakeLists.txt \
+        --replace-fail 'cmake_minimum_required(VERSION 2.6)' 'cmake_minimum_required(VERSION 3.10)'
+
+      substituteInPlace zlib/CMakeLists.txt \
+        --replace-fail 'cmake_minimum_required(VERSION 2.4.4)' 'cmake_minimum_required(VERSION 3.10)'
+
+      substituteInPlace snes_spc/CMakeLists.txt \
+        --replace-fail 'CMAKE_MINIMUM_REQUIRED (VERSION 2.4)' 'cmake_minimum_required(VERSION 3.10)'
+
+      substituteInPlace libpng/CMakeLists.txt \
+        --replace-fail 'cmake_minimum_required(VERSION 3.1)' 'cmake_minimum_required(VERSION 3.10)' \
+        --replace-fail 'cmake_policy(VERSION 3.1)' 'cmake_policy(VERSION 3.10)'
+
+      substituteInPlace adlmidi/libADLMIDI.pc.in \
+        --replace-fail 'libdir=''${exec_prefix}/@CMAKE_INSTALL_LIBDIR@' 'libdir=@CMAKE_INSTALL_FULL_LIBDIR@' \
+        --replace-fail 'includedir=''${prefix}/@CMAKE_INSTALL_INCLUDEDIR@' 'libdir=@CMAKE_INSTALL_FULL_INCLUDEDIR@'
+    ''
+    +
+    # Find installed 'base' data directory
+    ''
+      substituteInPlace source/hal/i_directory.cpp \
+        --replace-fail '/usr/local/share/eternity/base' "$out/share/eternity/base"
+    '';
+
   nativeBuildInputs = [
     cmake
     makeWrapper
   ];
+
   buildInputs = [
     libGL
     SDL2
     SDL2_mixer
     SDL2_net
+    zlib
   ];
 
-  installPhase = ''
-    install -Dm755 eternity/eternity $out/lib/eternity/eternity
-    cp -r $src/base $out/lib/eternity/base
-    mkdir $out/bin
-    makeWrapper $out/lib/eternity/eternity $out/bin/eternity
-  '';
-
   meta = {
     homepage = "https://doomworld.com/eternity";
     description = "New school Doom port by James Haley";
     mainProgram = "eternity";
     license = lib.licenses.gpl3;
     platforms = lib.platforms.linux;
-    maintainers = [ ];
+    maintainers = with lib.maintainers; [ aware70 ];
   };
-}
+})