diff --git a/gemset.nix b/gemset.nix
new file mode 100644
index 0000000..dd2a5dd
--- /dev/null
+++ b/gemset.nix
@@ -0,0 +1,27 @@
+{
+  mini_portile2 = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "15zplpfw3knqifj9bpf604rb3wc1vhq6363pd6lvhayng8wql5vy";
+      type = "gem";
+    };
+    version = "2.4.0";
+  };
+  nokogiri = {
+    dependencies = ["mini_portile2"];
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "09zll7c6j7xr6wyvh5mm5ncj6pkryp70ybcsxdbw1nyphx5dh184";
+      type = "gem";
+    };
+    version = "1.10.1";
+  };
+  rainbow = {
+    source = {
+      remotes = ["https://rubygems.org"];
+      sha256 = "0bb2fpjspydr6x0s8pn1pqkzmxszvkfapv0p4627mywl7ky4zkhk";
+      type = "gem";
+    };
+    version = "3.0.0";
+  };
+}
\ No newline at end of file