diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 90be2d6dd4a..5be04dac4a9 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -13394,4 +13394,20 @@ let
     };
   };
 
+  parsimonious = buildPythonPackage rec {
+    name = "parsimonious-0.6.0";
+    src = pkgs.fetchurl {
+      url = "https://github.com/erikrose/parsimonious/archive/0.6.tar.gz";
+      sha256 = "7ad992448b69a3f3d943bac0be132bced3f13937c8ca150ba2fd1d7b6534f846";
+    };
+
+    propagatedBuildInputs = with self; [ nose ];
+
+    meta = {
+      homepage = "https://github.com/erikrose/parsimonious";
+      description = "Fast arbitrary-lookahead packrat parser written in pure Python.";
+      license = licenses.mit;
+    };
+  };
+
 }); in pythonPackages