diff --git a/pkgs/applications/misc/dnd-tools/default.nix b/pkgs/applications/misc/dnd-tools/default.nix
new file mode 100644
index 000000000000..3b0d0ec90e25
--- /dev/null
+++ b/pkgs/applications/misc/dnd-tools/default.nix
@@ -0,0 +1,28 @@
+{ python3, fetchFromGitHub, fetchpatch, lib }:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "dnd-tools";
+  version = "unstable-2021-02-18";
+
+  src = fetchFromGitHub {
+    owner = "savagezen";
+    repo = pname;
+    rev = "baefb9e4b4b8279be89ec63d256dde9704dee078";
+    sha256 = "1rils3gzbfmwvgy51ah77qihwwbvx50q82lkc1kwcb55b3yinnmj";
+  };
+
+  # gives warning every time unless patched, see https://github.com/savagezen/dnd-tools/pull/20
+  patches = [
+    (fetchpatch {
+      url = "https://github.com/savagezen/dnd-tools/commit/0443f3a232056ad67cfb09eb3eadcb6344659198.patch";
+      sha256 = "00k8rsz2aj4sfag6l313kxbphcb5bjxb6z3aw66h26cpgm4kysp0";
+    })
+  ];
+
+  meta = with lib; {
+    homepage = "https://github.com/savagezen/dnd-tools";
+    description = "A set of interactive command line tools for Dungeons and Dragons 5th Edition";
+    license = licenses.agpl3Only;
+    maintainers = [ maintainers.urlordjames ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index be0b60596998..623f9cb9b151 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -23471,6 +23471,8 @@ in
     inherit (darwin.apple_sdk.frameworks) Foundation;
   };
 
+  dnd-tools = callPackage ../applications/misc/dnd-tools { };
+
   inherit (callPackage ../applications/virtualization/docker {})
     docker_20_10;