diff --git a/overlays/default.nix b/overlays/default.nix
index b1f1dcc3..1712dcbb 100644
--- a/overlays/default.nix
+++ b/overlays/default.nix
@@ -114,4 +114,6 @@ with final; {
     if true
     then throw "tracer-game: haddock runs on affection for 10 hours and more"
     else tracer.packages.${system}.tracer-game;
+
+  trainbot = callPackage ./trainbot.nix { };
 }
diff --git a/overlays/trainbot.nix b/overlays/trainbot.nix
new file mode 100644
index 00000000..5cc661c9
--- /dev/null
+++ b/overlays/trainbot.nix
@@ -0,0 +1,21 @@
+{ lib
+, buildGoModule
+, fetchFromGitHub
+, ffmpeg
+}:
+
+buildGoModule {
+  pname = "trainbot";
+  version = "unstable-2023-05-04";
+
+  src = fetchFromGitHub {
+    owner = "jo-m";
+    repo = "trainbot";
+    rev = "70cfe6aea483dc8c9936a006efe3c0b3ed271209";
+    sha256 = "sha256-T6IrSfRiEQJ4mUdsvBpp+9Q6hb74eRnphxDTXH9ui0k=";
+  };
+
+  checkInputs = [ ffmpeg ];
+
+  vendorHash = "sha256-DphXCfPW4w0aGI1e3aKQ9pDAMJ8wioPCDqRUR5gJ+Q4=";
+}