diff --git a/pkgs/development/python-modules/sly/default.nix b/pkgs/development/python-modules/sly/default.nix
new file mode 100644
index 0000000000000..011fa1799abd4
--- /dev/null
+++ b/pkgs/development/python-modules/sly/default.nix
@@ -0,0 +1,29 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pytest
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "sly";
+  version = "0.3";
+  disabled = pythonOlder "3.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "be6a3825b042a9e1b6f5730fc747e6d983c917f0f002d798d0b9f86ca5c05ad9";
+  };
+
+  checkInputs = [ pytest ];
+
+  # tests not included with pypi release
+  doCheck = false;
+
+  meta = with lib; {
+    description = "An improved PLY implementation of lex and yacc for Python 3";
+    homepage = https://github.com/dabeaz/sly;
+    license = licenses.bsd3;
+    maintainers = [ maintainers.costrouc ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 061674d31b204..a1cf7c2d32c37 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -778,6 +778,8 @@ in {
 
   slither-analyzer = callPackage ../development/python-modules/slither-analyzer { };
 
+  sly = callPackage ../development/python-modules/sly { };
+
   snapcast = callPackage ../development/python-modules/snapcast { };
 
   spglib = callPackage ../development/python-modules/spglib { };