diff --git a/pkgs/by-name/on/onscripter-en/package.nix b/pkgs/by-name/on/onscripter-en/package.nix
deleted file mode 100644
index 57c2703b691e..000000000000
--- a/pkgs/by-name/on/onscripter-en/package.nix
+++ /dev/null
@@ -1,66 +0,0 @@
-{
-  lib,
-  SDL,
-  SDL_image,
-  SDL_mixer,
-  SDL_ttf,
-  fetchFromGitHub,
-  freetype,
-  libjpeg,
-  libogg,
-  libpng,
-  libvorbis,
-  pkg-config,
-  smpeg,
-  stdenv,
-}:
-
-stdenv.mkDerivation (finalAttrs: {
-  pname = "onscripter-en";
-  version = "20110930";
-
-  # The website is not available now. Let's use a Museoa backup
-  src = fetchFromGitHub {
-    owner = "museoa";
-    repo = "onscripter-en";
-    rev = finalAttrs.version;
-    hash = "sha256-Lc5ZlH2C4ER02NmQ6icfiqpzVQdVUnOmdywGjjjSYSg=";
-  };
-
-  nativeBuildInputs = [
-    SDL
-    pkg-config
-    smpeg
-  ];
-
-  buildInputs = [
-    SDL
-    SDL_image
-    SDL_mixer
-    SDL_ttf
-    freetype
-    libjpeg
-    libogg
-    libpng
-    libvorbis
-    smpeg
-  ];
-
-  configureFlags = [ "--no-werror" ];
-
-  strictDeps = true;
-
-  preBuild = ''
-    sed -i 's/.dll//g' Makefile
-  '';
-
-  meta = {
-    homepage = "https://github.com/museoa/onscripter-en";
-    description = "Japanese visual novel scripting engine";
-    license = lib.licenses.gpl2Plus;
-    mainProgram = "onscripter-en";
-    maintainers = [ ];
-    platforms = lib.platforms.unix;
-    broken = stdenv.hostPlatform.isDarwin;
-  };
-})
diff --git a/pkgs/by-name/on/onscripter/add-make-install.patch b/pkgs/by-name/on/onscripter/add-make-install.patch
new file mode 100644
index 000000000000..f383c924059e
--- /dev/null
+++ b/pkgs/by-name/on/onscripter/add-make-install.patch
@@ -0,0 +1,12 @@
+diff --git a/Makefile.onscripter b/Makefile.onscripter
+index 0522dd0..6eede0d 100644
+--- a/Makefile.onscripter
++++ b/Makefile.onscripter
+@@ -130,3 +130,7 @@ FontInfo$(OBJSUFFIX): FontInfo.h Encoding.h
+ DirtyRect$(OBJSUFFIX) : DirtyRect.h
+ AVIWrapper$(OBJSUFFIX): AVIWrapper.h
+ LUAHandler$(OBJSUFFIX): $(ONSCRIPTER_HEADER) LUAHandler.h
++
++.PHONY: install
++install:
++	install -Dm755 -t $(out)/bin $(TARGET)
diff --git a/pkgs/by-name/on/onscripter/fix-darwin-build.patch b/pkgs/by-name/on/onscripter/fix-darwin-build.patch
new file mode 100644
index 000000000000..56f4530463e1
--- /dev/null
+++ b/pkgs/by-name/on/onscripter/fix-darwin-build.patch
@@ -0,0 +1,23 @@
+diff --git a/Makefile.MacOSX b/Makefile.MacOSX
+index 878ebf9..03f83c3 100644
+--- a/Makefile.MacOSX
++++ b/Makefile.MacOSX
+@@ -6,12 +6,17 @@
+ 
+ INCS = `sdl-config --cflags` `smpeg-config --cflags`
+ 
+-LIBS = `sdl-config --libs` `smpeg-config --libs` `freetype-config --libs` -lSDL_ttf -lSDL_image -lSDL_mixer -lbz2 -lm -ljpeg -framework QuickTime -framework CoreFoundation
++LIBS = `sdl-config --libs` `smpeg-config --libs` `freetype-config --libs` -lSDL_ttf -lSDL_image -lSDL_mixer -lbz2 -lm -ljpeg
+ DEFS = -DMACOSX -DUSE_CDROM -DUTF8_CAPTION -DUTF8_FILESYSTEM
+ 
+ EXESUFFIX =
+ OBJSUFFIX = .o
+ 
++# optional: lua
++DEFS += -DUSE_LUA
++LIBS += -llua
++EXT_OBJS += LUAHandler$(OBJSUFFIX)
++
+ .SUFFIXES:
+ .SUFFIXES: $(OBJSUFFIX) .cpp .h
+ 
diff --git a/pkgs/by-name/on/onscripter/fix-linux-build.patch b/pkgs/by-name/on/onscripter/fix-linux-build.patch
new file mode 100644
index 000000000000..5348881c57f7
--- /dev/null
+++ b/pkgs/by-name/on/onscripter/fix-linux-build.patch
@@ -0,0 +1,23 @@
+diff --git a/Makefile.Linux b/Makefile.Linux
+index 2b551bd..efb1f68 100644
+--- a/Makefile.Linux
++++ b/Makefile.Linux
+@@ -41,17 +41,9 @@ LIBS += -logg -lvorbis -lvorbisfile
+ # optional: support CD audio
+ DEFS += -DUSE_CDROM
+ 
+-# optional: avifile
+-DEFS += -DUSE_AVIFILE
+-INCS += `avifile-config --cflags`
+-LIBS += `avifile-config --libs`
+-TARGET += simple_aviplay$(EXESUFFIX)
+-EXT_OBJS += AVIWrapper$(OBJSUFFIX)
+-
+ # optional: lua
+ DEFS += -DUSE_LUA
+-INCS += -I/usr/include/lua5.1
+-LIBS += -llua5.1
++LIBS += -llua
+ EXT_OBJS += LUAHandler$(OBJSUFFIX)
+ 
+ # optional: force screen width for PDA
diff --git a/pkgs/by-name/on/onscripter/package.nix b/pkgs/by-name/on/onscripter/package.nix
new file mode 100644
index 000000000000..fdf5f537ed31
--- /dev/null
+++ b/pkgs/by-name/on/onscripter/package.nix
@@ -0,0 +1,97 @@
+{
+  lib,
+  SDL,
+  SDL_image,
+  SDL_mixer,
+  SDL_ttf,
+  bzip2,
+  fetchFromGitHub,
+  fontconfig,
+  freetype,
+  libjpeg,
+  libogg,
+  libpng,
+  libvorbis,
+  lua5_1,
+  runCommand,
+  smpeg,
+  stdenv,
+}:
+
+let
+  inherit (stdenv.hostPlatform) isDarwin;
+in
+stdenv.mkDerivation (finalAttrs: {
+  pname = "onscripter";
+  version = "20230825";
+
+  src = fetchFromGitHub {
+    owner = "ogapee";
+    repo = "onscripter";
+    rev = finalAttrs.version;
+    hash = "sha256-XaZTtOkV+2dHmcgZ4GbyiMxRBYdwT5eHxx+r05eAmBw=";
+  };
+
+  patches = [
+    # Add "install" target to Makefile
+    ./add-make-install.patch
+    # 1. Remove libavifile dependency, which is old and unmaintained
+    # 2. Replace -llua5.1 with -llua because the former didn't work even with Lua 5.1
+    ./fix-linux-build.patch
+    # 1. Remove direct linker flags for macOS SDKs.
+    # 2. Build with Lua
+    #
+    # ONScripter appears to depend on macOS SDKs only indirectly through SDL, so flags provided by
+    # the sdl-config command should suffice. The existing flags also referenced the deprecated
+    # QuickTime framework, resulting in a build failure.
+    ./fix-darwin-build.patch
+  ];
+
+  nativeBuildInputs = [
+    # Take cross compilation into account
+    (
+      let
+        commands = [
+          "${lib.getDev SDL}/bin/sdl-config"
+          "${lib.getDev smpeg}/bin/smpeg-config"
+        ]
+        ++ lib.optionals isDarwin [
+          "${lib.getDev freetype}/bin/freetype-config"
+        ];
+      in
+      runCommand "onscripter-host-deps" { } ''
+        mkdir -p $out/bin
+        ln -s ${lib.escapeShellArgs commands} $out/bin
+      ''
+    )
+  ];
+
+  buildInputs = [
+    SDL
+    SDL_image
+    SDL_mixer
+    SDL_ttf
+    bzip2
+    libjpeg
+    libogg
+    libpng
+    libvorbis
+    lua5_1
+    smpeg
+  ]
+  ++ (if isDarwin then [ freetype ] else [ fontconfig ]);
+
+  # The build script for BSDs also fall under Makefile.Linux
+  makefile = if isDarwin then "Makefile.MacOSX" else "Makefile.Linux";
+
+  strictDeps = true;
+
+  meta = {
+    homepage = "https://ogapee.github.io/www/onscripter_en.html";
+    description = "Japanese visual novel scripting engine";
+    license = lib.licenses.gpl2Plus;
+    mainProgram = "onscripter";
+    maintainers = with lib.maintainers; [ midchildan ];
+    platforms = lib.platforms.unix;
+  };
+})
diff --git a/pkgs/by-name/sd/SDL_mixer/package.nix b/pkgs/by-name/sd/SDL_mixer/package.nix
index e0fd4a8db33f..5e7d17b2a31a 100644
--- a/pkgs/by-name/sd/SDL_mixer/package.nix
+++ b/pkgs/by-name/sd/SDL_mixer/package.nix
@@ -11,7 +11,7 @@
   smpeg,
   stdenv,
   # passthru.tests
-  onscripter-en,
+  onscripter,
   # Boolean flags
   enableNativeMidi ? false,
   enableSdltest ? (!stdenv.hostPlatform.isDarwin),
@@ -108,7 +108,7 @@ stdenv.mkDerivation (finalAttrs: {
   strictDeps = true;
 
   passthru.tests = {
-    inherit onscripter-en;
+    inherit onscripter;
   };
 
   meta = {
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index e4ef545384ed..8260613264d6 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1955,6 +1955,7 @@ mapAliases {
   offrss = throw "offrss has been removed due to lack of upstream maintenance; consider using another rss reader"; # Added 2025-06-01
   oil = lib.warnOnInstantiate "Oil has been replaced with the faster native C++ version and renamed to 'oils-for-unix'. See also https://github.com/oils-for-unix/oils/wiki/Oils-Deployments" oils-for-unix; # Added 2024-10-22
   onevpl-intel-gpu = lib.warnOnInstantiate "onevpl-intel-gpu has been renamed to vpl-gpu-rt" vpl-gpu-rt; # Added 2024-06-04
+  onscripter-en = throw "onscripter-en has been removed due to lack of maintenance in both upstream and Nixpkgs; onscripter is available instead"; # Added 2025-10-17
   onthespot = throw "onethespot has been removed due to lack of upstream maintenance"; # Added 2025-09-26
   openai-triton-llvm = triton-llvm; # added 2024-07-18
   openai-whisper-cpp = whisper-cpp; # Added 2024-12-13