pkgsets/python3: pkgs should be mergable function

options/machine.nix

@@ -12,7 +12,7 @@ let
   serviceList = fn.makeOptionTypeList (toString ../services);
   pkgOption = pname: {
     name = pname;
-    value = rec {
+    value = {
       pkgwrap = mkOption {
         type =
           with types;
@@ -26,7 +26,10 @@ let
         '';
       };
       pkgs = mkOption {
-        type = types.unspecified;
+        type = types.oneOf [
+          (types.listOf types.package)
+          (types.functionTo (types.listOf types.package))
+        ];
         default = [ ];
         description = ''
           ${pname} package list.

pkgsets/python3.nix

@@ -1,25 +1,33 @@
 {
   config,
-  lib,
   pkgs,
   ...
 }:
-with lib;
+
 {
-  machine.pkgsets.python3.pkgwrap = pkgs.python3.withPackages (
-    ps: (fn.pkgFilter config.machine.pkgsets.python3.pkgs)
-  );
-  machine.pkgsets.python3.pkgs = with pkgs.python3Packages; [
+  machine.pkgsets.python3 = {
+    pkgwrap = pkgs.python3.withPackages (config.machine.pkgsets.python3.pkgs);
+    pkgs = ps: with ps; [
       bpython
+      click
       flake8
       genanki
+      holidays
       matplotlib
       mypy
       mysqlclient
       numpy
       pandas
       pillow
+      pyaml
       scipy
+      jupyter
+      jupyterlab
+      requests
+      pip
+      notebook
+      seaborn
       virtualenv
     ];
+  };
 }

services/desktop/i3.nix

@@ -20,7 +20,7 @@ mkIf (elem "desktop::i3" config.machine.services) {
       ];
     };
   };
-  machine.pkgsets.python3.pkgs = with pkgs.python3Packages; [
+  machine.pkgsets.python3.pkgs = ps: with ps; [
     py3status
     pytz
     tzlocal