diff --git a/pkgs/development/python-modules/biliass/default.nix b/pkgs/development/python-modules/biliass/default.nix
new file mode 100644
index 000000000000..fe2cd731a1ce
--- /dev/null
+++ b/pkgs/development/python-modules/biliass/default.nix
@@ -0,0 +1,28 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, protobuf
+}:
+
+buildPythonPackage rec {
+  pname = "biliass";
+  version = "1.3.4";
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-kktK+6rLwYhkG7LiTBlgBbiIN8apweg4l8pJSTjKQU4=";
+  };
+
+  propagatedBuildInputs = [ protobuf ];
+
+  pythonImportsCheck = [ "biliass" ];
+
+  meta = with lib; {
+    homepage = "https://github.com/yutto-dev/biliass";
+    description = "Convert Bilibili XML/protobuf danmaku to ASS subtitle";
+    license = licenses.gpl3Only;
+    maintainers = with maintainers; [ linsui ];
+  };
+}
diff --git a/pkgs/tools/misc/yutto/default.nix b/pkgs/tools/misc/yutto/default.nix
new file mode 100644
index 000000000000..3d60bad0a4cc
--- /dev/null
+++ b/pkgs/tools/misc/yutto/default.nix
@@ -0,0 +1,51 @@
+{ lib
+, buildPythonApplication
+, fetchPypi
+, pythonOlder
+, poetry-core
+, aiohttp
+, aiofiles
+, biliass
+, dicttoxml
+, colorama
+, ffmpeg
+, makeWrapper
+}:
+
+buildPythonApplication rec {
+  pname = "yutto";
+  version = "2.0.0b13";
+  format = "pyproject";
+
+  disabled = pythonOlder "3.9";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-XqfbvlaJoRPpwnaUA52KloOsEOIt3YM0cq36DZN6lR8=";
+  };
+
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
+  propagatedBuildInputs = [
+    aiohttp
+    aiofiles
+    biliass
+    dicttoxml
+    colorama
+  ];
+
+  preFixup = ''
+    makeWrapperArgs+=(--prefix PATH : ${lib.makeBinPath [ ffmpeg ]})
+  '';
+
+  pythonImportsCheck = [ "yutto" ];
+
+  meta = with lib; {
+    description = "A Bilibili downloader";
+    homepage = "https://github.com/yutto-dev/yutto";
+    license = licenses.gpl3Only;
+    maintainers = with maintainers; [ linsui ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 74169cac397b..fa41be37c439 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2671,6 +2671,8 @@ with pkgs;
 
   bicon = callPackage ../applications/misc/bicon { };
 
+  biliass = with python3.pkgs; toPythonApplication biliass;
+
   bindfs = callPackage ../tools/filesystems/bindfs { };
 
   binwalk = with python3Packages; toPythonApplication binwalk;
@@ -30975,6 +30977,8 @@ with pkgs;
 
   ytmdl = callPackage ../tools/misc/ytmdl { };
 
+  yutto = with python3.pkgs; toPythonApplication yutto;
+
   yuview = libsForQt5.yuview;
 
   zam-plugins = callPackage ../applications/audio/zam-plugins { };
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index e654aea72561..188e6c11b5e4 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1227,6 +1227,8 @@ in {
 
   bids-validator = callPackage ../development/python-modules/bids-validator { };
 
+  biliass = callPackage ../development/python-modules/biliass { };
+
   billiard = callPackage ../development/python-modules/billiard { };
 
   bimmer-connected = callPackage ../development/python-modules/bimmer-connected { };
@@ -11377,6 +11379,8 @@ in {
 
   yubico-client = callPackage ../development/python-modules/yubico-client { };
 
+  yutto = callPackage ../tools/misc/yutto { };
+
   z3c-checkversions = callPackage ../development/python-modules/z3c-checkversions { };
 
   z3 = (toPythonModule (pkgs.z3.override {