diff --git a/pkgs/by-name/bm/bms-to-osu/deps.json b/pkgs/by-name/bm/bms-to-osu/deps.json
new file mode 100644
index 000000000000..567b37a938f6
--- /dev/null
+++ b/pkgs/by-name/bm/bms-to-osu/deps.json
@@ -0,0 +1,82 @@
+[
+  {
+    "pname": "CommandLineParser",
+    "version": "2.9.1",
+    "hash": "sha256-ApU9y1yX60daSjPk3KYDBeJ7XZByKW8hse9NRZGcjeo="
+  },
+  {
+    "pname": "Microsoft.Extensions.Configuration.Abstractions",
+    "version": "6.0.0",
+    "hash": "sha256-Evg+Ynj2QUa6Gz+zqF+bUyfGD0HI5A2fHmxZEXbn3HA="
+  },
+  {
+    "pname": "Microsoft.Extensions.DependencyInjection",
+    "version": "6.0.0",
+    "hash": "sha256-gZuMaunMJVyvvepuzNodGPRc6eqKH//bks3957dYkPI="
+  },
+  {
+    "pname": "Microsoft.Extensions.DependencyInjection.Abstractions",
+    "version": "6.0.0",
+    "hash": "sha256-SZke0jNKIqJvvukdta+MgIlGsrP2EdPkkS8lfLg7Ju4="
+  },
+  {
+    "pname": "Microsoft.Extensions.Logging",
+    "version": "6.0.0",
+    "hash": "sha256-8WsZKRGfXW5MsXkMmNVf6slrkw+cR005czkOP2KUqTk="
+  },
+  {
+    "pname": "Microsoft.Extensions.Logging.Abstractions",
+    "version": "6.0.0",
+    "hash": "sha256-QNqcQ3x+MOK7lXbWkCzSOWa/2QyYNbdM/OEEbWN15Sw="
+  },
+  {
+    "pname": "Microsoft.Extensions.Options",
+    "version": "6.0.0",
+    "hash": "sha256-DxnEgGiCXpkrxFkxXtOXqwaiAtoIjA8VSSWCcsW0FwE="
+  },
+  {
+    "pname": "Microsoft.Extensions.Primitives",
+    "version": "6.0.0",
+    "hash": "sha256-AgvysszpQ11AiTBJFkvSy8JnwIWTj15Pfek7T7ThUc4="
+  },
+  {
+    "pname": "NLog",
+    "version": "5.2.5",
+    "hash": "sha256-QCYHzZ45Gf30NzJaVmGR8kKhIkfrVVjl+J+dliJe3gk="
+  },
+  {
+    "pname": "NLog.Extensions.Logging",
+    "version": "5.3.5",
+    "hash": "sha256-UjmnTnE3XwMRvyHUywwaOwWeRLWMICNF63sXKoLC7ks="
+  },
+  {
+    "pname": "NStack.Core",
+    "version": "0.17.1",
+    "hash": "sha256-sVuArQwL2dzytCei2fhCNg1Bcm4vntPb+PpXStk3rqM="
+  },
+  {
+    "pname": "System.Diagnostics.DiagnosticSource",
+    "version": "6.0.0",
+    "hash": "sha256-RY9uWSPdK2fgSwlj1OHBGBVo3ZvGQgBJNzAsS5OGMWc="
+  },
+  {
+    "pname": "System.Runtime.CompilerServices.Unsafe",
+    "version": "6.0.0",
+    "hash": "sha256-bEG1PnDp7uKYz/OgLOWs3RWwQSVYm+AnPwVmAmcgp2I="
+  },
+  {
+    "pname": "System.Text.Encoding.CodePages",
+    "version": "6.0.0",
+    "hash": "sha256-nGc2A6XYnwqGcq8rfgTRjGr+voISxNe/76k2K36coj4="
+  },
+  {
+    "pname": "System.ValueTuple",
+    "version": "4.5.0",
+    "hash": "sha256-niH6l2fU52vAzuBlwdQMw0OEoRS/7E1w5smBFoqSaAI="
+  },
+  {
+    "pname": "Terminal.Gui",
+    "version": "1.7.2",
+    "hash": "sha256-qt42B0L8Na3kRCKkzmPru8IoLcjyn6nosEJL7nb67aA="
+  }
+]
diff --git a/pkgs/by-name/bm/bms-to-osu/package.nix b/pkgs/by-name/bm/bms-to-osu/package.nix
new file mode 100644
index 000000000000..adfa44349422
--- /dev/null
+++ b/pkgs/by-name/bm/bms-to-osu/package.nix
@@ -0,0 +1,43 @@
+{
+  lib,
+  fetchFromGitHub,
+  buildDotnetModule,
+  ncurses,
+  ffmpeg,
+}:
+
+let
+  pname = "bms-to-osu";
+  version = "2.5-unstable-2025-01-14"; # 2.5 crashes at runtime due to missing kernel32.dll
+in
+buildDotnetModule {
+  inherit pname version;
+
+  src = fetchFromGitHub {
+    owner = "QingQiz";
+    repo = "BmsToOsu";
+    rev = "e6b9dbf44ccdda7db15bf28e32d1fc1e5431319f"; # tag = "v${version}";
+    hash = "sha256-JaehaKjV2fGyH6hAKwoo0t2B+hRWOjpQoIJpZq8J8C8=";
+  };
+
+  makeWrapperArgs = [
+    "--suffix"
+    "PATH"
+    ":"
+    "${ffmpeg}/bin"
+  ];
+
+  nugetDeps = ./deps.json;
+  projectFile = "BmsToOsu.sln";
+  executables = [ "BmsToOsu" ];
+  runtimeDeps = [ ncurses ];
+
+  meta = {
+    description = "Convert BMS files to osu! beatmap files";
+    license = lib.licenses.agpl3Only;
+    maintainers = with lib.maintainers; [ ulysseszhan ];
+    homepage = "https://github.com/QingQiz/BmsToOsu";
+    platforms = lib.platforms.unix;
+    mainProgram = "BmsToOsu";
+  };
+}