diff --git a/pkgs/clightning-plugins/default.nix b/pkgs/clightning-plugins/default.nix
index eb1d5ac..bf8443b 100644
--- a/pkgs/clightning-plugins/default.nix
+++ b/pkgs/clightning-plugins/default.nix
@@ -14,7 +14,10 @@ let
 
   plugins = with nbPython3Packages; {
     helpme = { description = "Walks you through setting up a c-lightning node, offering advice for common problems"; };
-    monitor = { description = "Helps you analyze the health of your peers and channels"; };
+    monitor = {
+      description = "Helps you analyze the health of your peers and channels";
+      extraPkgs = [ packaging ];
+    };
     prometheus = {
       description = "Lightning node exporter for the prometheus timeseries server";
       extraPkgs = [ prometheus_client ];
diff --git a/pkgs/python-packages/coincurve/default.nix b/pkgs/python-packages/coincurve/default.nix
index 042ac67..2e5156d 100644
--- a/pkgs/python-packages/coincurve/default.nix
+++ b/pkgs/python-packages/coincurve/default.nix
@@ -3,11 +3,11 @@ autoconf, automake, libtool, libffi, requests }:
 
 buildPythonPackage rec {
   pname = "coincurve";
-  version = "15.0.0";
+  version = "17.0.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0ras7qb4ib9sik703fcb9f3jrgq7nx5wvdgx9k1pshmrxl8lnlh6";
+    hash = "sha256-aNpVr/iYcClS/aPuBP1u1gu2uR+RnGknB4btdmtUi5M";
   };
 
   doCheck = false;
diff --git a/pkgs/python-packages/default.nix b/pkgs/python-packages/default.nix
index c0a7568..39fdcc0 100644
--- a/pkgs/python-packages/default.nix
+++ b/pkgs/python-packages/default.nix
@@ -4,6 +4,8 @@ let
 
   joinmarketPkg = pkg: callPackage pkg { inherit (nbPkgs.joinmarket) version src; };
   clightningPkg = pkg: callPackage pkg { inherit (nbPkgs.pinned) clightning; };
+
+  unstable = (import ../nixpkgs-pinned.nix).nixpkgs-unstable;
 in {
   bencoderpyx = callPackage ./bencoderpyx {};
   coincurve = callPackage ./coincurve {};
@@ -26,15 +28,17 @@ in {
 
   ## Specific versions of packages that already exist in nixpkgs
 
-  # base58 2.1.0, required by pyln-proto
-  base58 = callPackage ./specific-versions/base58.nix {};
-
   # cryptography 3.3.2, required by joinmarketdaemon
   # Used in the private python package set for joinmarket (../joinmarket/default.nix)
   cryptography_3_3_2 = callPackage ./specific-versions/cryptography {
     cryptography_vectors = callPackage ./specific-versions/cryptography/vectors.nix {};
   };
 
+  # cryptography 36.0.0, required by pyln-proto.
+  cryptography = callPackage "${unstable}/pkgs/development/python-modules/cryptography" {
+    Security = self.darwin.apple_sdk.frameworks.Security;
+  };
+
   # autobahn 20.12.3, required by joinmarketclient
   autobahn = callPackage ./specific-versions/autobahn.nix {};
 
diff --git a/pkgs/python-packages/pyln-bolt7/default.nix b/pkgs/python-packages/pyln-bolt7/default.nix
index 84cb855..16bf920 100644
--- a/pkgs/python-packages/pyln-bolt7/default.nix
+++ b/pkgs/python-packages/pyln-bolt7/default.nix
@@ -1,22 +1,17 @@
-{ buildPythonPackage, clightning, pyln-proto }:
+{ buildPythonPackage, poetry-core, pytestCheckHook, clightning, pyln-proto }:
 
 buildPythonPackage rec {
   pname = "pyln-bolt7";
-
-  # See fn `bolt_meta` in
-  # https://github.com/ElementsProject/lightning/blob/master/contrib/pyln-spec/bolt7/setup.py
-  version = "1.0.2.186";
+  # The version is defined here:
+  # https://github.com/ElementsProject/lightning/blob/master/contrib/pyln-spec/bolt7/pyproject.toml
+  version = "1.0.2.186.post0";
+  format = "pyproject";
 
   inherit (clightning) src;
 
+  nativeBuildInputs = [ poetry-core ];
   propagatedBuildInputs = [ pyln-proto ];
+  checkInputs = [ pytestCheckHook ];
 
   postUnpack = "sourceRoot=$sourceRoot/contrib/pyln-spec/bolt7";
-
-  # TODO-EXTERNAL:
-  # Remove when this fix is released
-  # https://github.com/ElementsProject/lightning/pull/4910
-  postPatch = ''
-    sed -i 's|pyln.proto|pyln-proto|' requirements.txt
-  '';
 }
diff --git a/pkgs/python-packages/pyln-client/default.nix b/pkgs/python-packages/pyln-client/default.nix
index 9ca49f8..b997ce4 100644
--- a/pkgs/python-packages/pyln-client/default.nix
+++ b/pkgs/python-packages/pyln-client/default.nix
@@ -1,14 +1,27 @@
-{ buildPythonPackage, clightning, pyln-bolt7, recommonmark, setuptools-scm }:
+{ buildPythonPackage, poetry-core, pytestCheckHook, clightning, pyln-bolt7, pyln-proto }:
 
 buildPythonPackage rec {
   pname = "pyln-client";
   version = clightning.version;
+  format = "pyproject";
 
   inherit (clightning) src;
 
-  propagatedBuildInputs = [ pyln-bolt7 recommonmark setuptools-scm ];
+  nativeBuildInputs = [ poetry-core ];
 
-  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+  propagatedBuildInputs = [
+    pyln-bolt7
+    pyln-proto
+  ];
+
+  checkInputs = [ pytestCheckHook ];
 
   postUnpack = "sourceRoot=$sourceRoot/contrib/${pname}";
+
+  # Fix version typo in pyproject.toml
+  # TODO-EXTERNAL:
+  # This is already fixed upstream. Remove this after the next clightning release.
+  postPatch = ''
+    sed -i 's|pyln-bolt7 = "^1.0.186"|pyln-bolt7 = "^1.0.2.186"|' pyproject.toml
+  '';
 }
diff --git a/pkgs/python-packages/pyln-proto/default.nix b/pkgs/python-packages/pyln-proto/default.nix
index 80303a2..29ee61a 100644
--- a/pkgs/python-packages/pyln-proto/default.nix
+++ b/pkgs/python-packages/pyln-proto/default.nix
@@ -1,38 +1,30 @@
-{ buildPythonPackage, clightning
+{ buildPythonPackage
+, clightning
+, poetry-core
+, pytestCheckHook
 , bitstring
 , cryptography
 , coincurve
 , base58
-, mypy
-, pycparser
-, setuptools-scm
 }:
 
 buildPythonPackage rec {
   pname = "pyln-proto";
   version = clightning.version;
+  format = "pyproject";
 
   inherit (clightning) src;
 
+  nativeBuildInputs = [ poetry-core ];
+
   propagatedBuildInputs = [
     bitstring
     cryptography
     coincurve
-    pycparser
     base58
-    mypy
-    setuptools-scm
   ];
 
-  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+  checkInputs = [ pytestCheckHook ];
 
   postUnpack = "sourceRoot=$sourceRoot/contrib/pyln-proto";
-  postPatch = ''
-    sed -i '
-      s|pycparser==2.20|pycparser~=2.20|
-      s|coincurve ~= 13.0|coincurve == 15.0.0|
-      s|base58 ~= 2.0.1|base58 == 2.1.0|
-      s|mypy==0.790|mypy == 0.812|
-    ' requirements.txt
-  '';
 }
diff --git a/pkgs/python-packages/specific-versions/base58.nix b/pkgs/python-packages/specific-versions/base58.nix
deleted file mode 100644
index 1437683..0000000
--- a/pkgs/python-packages/specific-versions/base58.nix
+++ /dev/null
@@ -1,34 +0,0 @@
-{ lib
-, buildPythonPackage
-, fetchPypi
-, pyhamcrest
-, pytest-benchmark
-, pytestCheckHook
-, pythonOlder
-}:
-
-buildPythonPackage rec {
-  pname = "base58";
-  version = "2.1.0";
-  disabled = pythonOlder "3.5";
-
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "sha256-FxpUe0o8YeGuOAciSm967HXjZMQ5XnViZJ1zNXaAAaI=";
-  };
-
-  checkInputs = [
-    pyhamcrest
-    pytest-benchmark
-    pytestCheckHook
-  ];
-
-  pythonImportsCheck = [ "base58" ];
-
-  meta = with lib; {
-    description = "Base58 and Base58Check implementation";
-    homepage = "https://github.com/keis/base58";
-    license = licenses.mit;
-    maintainers = with maintainers; [ nyanloutre ];
-  };
-}