diff --git a/pkgs/development/python-modules/baron/default.nix b/pkgs/development/python-modules/baron/default.nix
new file mode 100644
index 00000000000..8a04befc6d1
--- /dev/null
+++ b/pkgs/development/python-modules/baron/default.nix
@@ -0,0 +1,24 @@
+{ lib, fetchPypi, buildPythonPackage, rply, pytestCheckHook, isPy3k }:
+
+buildPythonPackage rec {
+  pname = "baron";
+  version = "0.9";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0fib74nkqnl1i2zzlhbbfpw3whwc4951p9x61r2xrxhwp4r9yn5h";
+  };
+
+  propagatedBuildInputs = [ rply ];
+
+  checkInputs = [ pytestCheckHook ];
+
+  doCheck = isPy3k;
+
+  meta = with lib; {
+    homepage = "https://github.com/gristlabs/asttokens";
+    description = "Abstraction on top of baron, a FST for python to make writing refactoring code a realistic task";
+    license = licenses.lgpl3Plus;
+    maintainers = with maintainers; [ marius851000 ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index ac981709cb2..c1d379f5773 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -752,6 +752,8 @@ in {
 
   bap = callPackage ../development/python-modules/bap { bap = pkgs.ocaml-ng.ocamlPackages_4_06.bap; };
 
+  baron = callPackage ../development/python-modules/baron { };
+
   base58 = callPackage ../development/python-modules/base58 { };
 
   baselines = callPackage ../development/python-modules/baselines { };