diff --git a/pkgs/default.nix b/pkgs/default.nix
index 672f2b2..e79149e 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -9,7 +9,7 @@ let self = {
   cl-rest = pkgs.callPackage ./cl-rest { };
   clboss = pkgs.callPackage ./clboss { };
   clightning-plugins = pkgs.recurseIntoAttrs (import ./clightning-plugins pkgs self.nbPython3Packages);
-  joinmarket = pkgs.callPackage ./joinmarket { inherit (self) nbPython3Packages; };
+  joinmarket = pkgs.callPackage ./joinmarket { nbPythonPackageOverrides = import ./python-packages self; };
   lndinit = pkgs.callPackage ./lndinit { };
   liquid-swap = pkgs.python3Packages.callPackage ./liquid-swap { };
   rtl = pkgs.callPackage ./rtl { };
diff --git a/pkgs/joinmarket/default.nix b/pkgs/joinmarket/default.nix
index 2ec027e..4ffc890 100644
--- a/pkgs/joinmarket/default.nix
+++ b/pkgs/joinmarket/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, applyPatches, fetchpatch, python3, nbPython3Packages, pkgs }:
+{ stdenv, lib, fetchurl, applyPatches, fetchpatch, python3, nbPythonPackageOverrides, pkgs }:
 
 let
   version = "0.9.5";
@@ -17,7 +17,17 @@ let
     ];
   };
 
-  runtimePackages = with nbPython3Packages; [
+  pyPkgs = (python3.override {
+    packageOverrides = (self: super: let
+      overrides = nbPythonPackageOverrides self super;
+    in
+      overrides // {
+        cryptography = overrides.cryptography_3_3_2;
+      }
+    );
+  }).pkgs;
+
+  runtimePackages = with pyPkgs; [
     joinmarketbase
     joinmarketclient
     joinmarketbitcoin
diff --git a/pkgs/python-packages/default.nix b/pkgs/python-packages/default.nix
index c7162f3..c0a7568 100644
--- a/pkgs/python-packages/default.nix
+++ b/pkgs/python-packages/default.nix
@@ -30,13 +30,15 @@ in {
   base58 = callPackage ./specific-versions/base58.nix {};
 
   # cryptography 3.3.2, required by joinmarketdaemon
-  cryptography = callPackage ./specific-versions/cryptography {};
-  cryptography_vectors = callPackage ./specific-versions/cryptography/vectors.nix {};
+  # 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 {};
+  };
 
   # autobahn 20.12.3, required by joinmarketclient
   autobahn = callPackage ./specific-versions/autobahn.nix {};
 
-  # tubes 0.2.0, required by klein
+  # tubes 0.2.0, required by jmclient (via pkg `klein`)
   tubes = callPackage ./specific-versions/tubes.nix {};
 
   # recommonmark 0.7.1, required by pyln-client