diff --git a/pkgs/development/python-modules/google_cloud_dataproc/default.nix b/pkgs/development/python-modules/google_cloud_dataproc/default.nix
index 3db04fb7d4ba..c7d0bf1b730b 100644
--- a/pkgs/development/python-modules/google_cloud_dataproc/default.nix
+++ b/pkgs/development/python-modules/google_cloud_dataproc/default.nix
@@ -4,6 +4,8 @@
 , google_api_core
 , pytest
 , mock
+, libcst
+, proto-plus
 }:
 
 buildPythonPackage rec {
@@ -16,7 +18,7 @@ buildPythonPackage rec {
   };
 
   checkInputs = [ pytest mock ];
-  propagatedBuildInputs = [ google_api_core ];
+  propagatedBuildInputs = [ google_api_core libcst proto-plus ];
 
   checkPhase = ''
     pytest tests/unit
diff --git a/pkgs/development/python-modules/libcst/default.nix b/pkgs/development/python-modules/libcst/default.nix
new file mode 100644
index 000000000000..5f4fec2612a0
--- /dev/null
+++ b/pkgs/development/python-modules/libcst/default.nix
@@ -0,0 +1,36 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, typing-inspect
+, pyyaml
+, isPy3k
+}:
+
+buildPythonPackage rec {
+  pname = "libcst";
+  version = "0.3.12";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1zgwxdbhz2ljl0yzbrn1f4f464rjphx0j6r4qq0csax3m4wp50x1";
+  };
+
+  # The library uses type annotation syntax.
+  disabled = !isPy3k;
+
+  propagatedBuildInputs = [ typing-inspect pyyaml ];
+
+  # Test fails with ValueError: No data_provider tests were created for
+  # test_type_availability! Please double check your data.
+  # The tests appear to be doing some dynamic introspection, not sure what is
+  # going on there.
+  doCheck = false;
+  pythonImportsCheck = [ "libcst" ];
+
+  meta = with stdenv.lib; {
+    description = "A concrete syntax tree parser and serializer library for Python that preserves many aspects of Python's abstract syntax tree";
+    homepage = "https://libcst.readthedocs.io/en/latest/";
+    license = with licenses; [mit asl20 psfl];
+    maintainers = [ maintainers.ruuda ];
+  };
+}
diff --git a/pkgs/development/python-modules/proto-plus/default.nix b/pkgs/development/python-modules/proto-plus/default.nix
new file mode 100644
index 000000000000..6048f393d87e
--- /dev/null
+++ b/pkgs/development/python-modules/proto-plus/default.nix
@@ -0,0 +1,24 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, protobuf
+}:
+
+buildPythonPackage rec {
+  pname = "proto-plus";
+  version = "1.10.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0n8ia51jg2dkab2sf0qnh39bssqhz65ybcqr78f3zzf7ja923lkr";
+  };
+
+  propagatedBuildInputs = [ protobuf ];
+
+  meta = with stdenv.lib; {
+    description = "Beautiful, idiomatic protocol buffers in Python";
+    homepage = "https://github.com/googleapis/proto-plus-python";
+    license = licenses.asl20;
+    maintainers = [ maintainers.ruuda ];
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 4d441a59f62e..515ce7931b54 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3275,6 +3275,8 @@ in {
   else
     callPackage ../development/python-modules/libcloud { };
 
+  libcst = callPackage ../development/python-modules/libcst { };
+
   libevdev = callPackage ../development/python-modules/libevdev { };
 
   libfdt = toPythonModule (pkgs.dtc.override {
@@ -4616,6 +4618,8 @@ in {
 
   protego = callPackage ../development/python-modules/protego { };
 
+  proto-plus = callPackage ../development/python-modules/proto-plus { };
+
   protobuf = callPackage ../development/python-modules/protobuf {
     disabled = isPyPy;
     doCheck =