diff --git a/pkgs/default.nix b/pkgs/default.nix
index 21ede79..ed7bc41 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -13,7 +13,7 @@ let self = {
   clightning-rest = pkgs.callPackage ./clightning-rest { inherit (self) fetchNodeModules; };
   clboss = pkgs.callPackage ./clboss { };
   clightning-plugins = pkgs.recurseIntoAttrs (import ./clightning-plugins pkgs self.nbPython3Packages);
-  joinmarket = pkgs.callPackage ./joinmarket { nbPythonPackageOverrides = import ./python-packages self; };
+  joinmarket = pkgs.callPackage ./joinmarket { inherit (self) nbPython3PackagesJoinmarket; };
   lndinit = pkgs.callPackage ./lndinit { };
   liquid-swap = pkgs.python3Packages.callPackage ./liquid-swap { };
   rtl = pkgs.callPackage ./rtl { inherit (self) fetchNodeModules; };
@@ -21,9 +21,10 @@ let self = {
   secp256k1 = pkgs.callPackage ./secp256k1 { };
   spark-wallet = pkgs.callPackage ./spark-wallet { };
 
-  nbPython3Packages = (pkgs.python3.override {
-    packageOverrides = import ./python-packages self;
-  }).pkgs;
+  pyPkgs = import ./python-packages self pkgs.python3;
+  inherit (self.pyPkgs)
+    nbPython3Packages
+    nbPython3PackagesJoinmarket;
 
   fetchNodeModules = pkgs.callPackage ./build-support/fetch-node-modules.nix { };
 
diff --git a/pkgs/joinmarket/default.nix b/pkgs/joinmarket/default.nix
index 1f40128..2fc91ed 100644
--- a/pkgs/joinmarket/default.nix
+++ b/pkgs/joinmarket/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, python3, nbPythonPackageOverrides, pkgs }:
+{ stdenv, lib, fetchurl, python3, nbPython3PackagesJoinmarket }:
 
 let
   version = "0.9.7";
@@ -7,17 +7,7 @@ let
     sha256 = "13bfr8ha6bka8wiai8m79ki43dn2r311lrfffr39ni2wy1v12l93";
   };
 
-  pyPkgs = (python3.override {
-    packageOverrides = (self: super: let
-      overrides = nbPythonPackageOverrides self super;
-    in
-      overrides // {
-        cryptography = overrides.cryptography_3_3_2;
-      }
-    );
-  }).pkgs;
-
-  runtimePackages = with pyPkgs; [
+  runtimePackages = with nbPython3PackagesJoinmarket; [
     joinmarketbase
     joinmarketclient
     joinmarketbitcoin
diff --git a/pkgs/python-packages/default.nix b/pkgs/python-packages/default.nix
index 0849ecc..0032465 100644
--- a/pkgs/python-packages/default.nix
+++ b/pkgs/python-packages/default.nix
@@ -1,42 +1,48 @@
-nbPkgs: self: super:
-let
-  inherit (self) callPackage;
-
-  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 {};
-      chromalog = callPackage ./chromalog {};
+nbPkgs: python3:
+rec {
+  pyPkgsOverrides = self: super: let
+    inherit (self) callPackage;
+    clightningPkg = pkg: callPackage pkg { inherit (nbPkgs.pinned) clightning; };
+  in
+    {
       coincurve = callPackage ./coincurve {};
-      python-bitcointx = callPackage ./python-bitcointx { inherit (nbPkgs) secp256k1; };
-      runes = callPackage ./runes {};
-      sha256 = callPackage ./sha256 {};
       txzmq = callPackage ./txzmq {};
-      urldecode = callPackage ./urldecode {};
-
-      joinmarketbase = joinmarketPkg ./jmbase;
-      joinmarketclient = joinmarketPkg ./jmclient;
-      joinmarketbitcoin = joinmarketPkg ./jmbitcoin;
-      joinmarketdaemon = joinmarketPkg ./jmdaemon;
 
       pyln-client = clightningPkg ./pyln-client;
       pyln-proto = clightningPkg ./pyln-proto;
       pyln-bolt7 = clightningPkg ./pyln-bolt7;
       pylightning = clightningPkg ./pylightning;
 
+      # Packages only used by joinmarket
+      bencoderpyx = callPackage ./bencoderpyx {};
+      chromalog = callPackage ./chromalog {};
+      python-bitcointx = callPackage ./python-bitcointx { inherit (nbPkgs) secp256k1; };
+      runes = callPackage ./runes {};
+      sha256 = callPackage ./sha256 {};
+      urldecode = callPackage ./urldecode {};
+    };
+
+  # Joinmarket requires a custom package set because it uses older versions of Python pkgs
+  pyPkgsOverridesJoinmarket = self: super: let
+    inherit (self) callPackage;
+    joinmarketPkg = pkg: callPackage pkg { inherit (nbPkgs.joinmarket) version src; };
+  in
+    (pyPkgsOverrides self super) // {
+      joinmarketbase = joinmarketPkg ./jmbase;
+      joinmarketclient = joinmarketPkg ./jmclient;
+      joinmarketbitcoin = joinmarketPkg ./jmbitcoin;
+      joinmarketdaemon = joinmarketPkg ./jmdaemon;
+
       # Don't mark `klein` as broken.
       # `klein` is fixed by using werkzeug 2.1.0 (see below)
       klein = super.klein.overrideAttrs (old: {
         meta = builtins.removeAttrs old.meta [ "broken" ];
       });
-
       ## Specific versions of packages that already exist in nixpkgs
 
       # 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 = callPackage ./specific-versions/cryptography {
         cryptography_vectors = callPackage ./specific-versions/cryptography/vectors.nix {};
       };
 
@@ -48,4 +54,13 @@ in {
 
       # pyopenssl 20.0.1, required by joinmarketdaemon
       pyopenssl = callPackage ./specific-versions/pyopenssl.nix {};
+    };
+
+  nbPython3Packages = (python3.override {
+    packageOverrides = pyPkgsOverrides;
+  }).pkgs;
+
+  nbPython3PackagesJoinmarket = (python3.override {
+    packageOverrides = pyPkgsOverridesJoinmarket;
+  }).pkgs;
 }