flake: latest nixpkgs breaks too much stuff; lock a few things to an older version

flake.lock

@@ -489,6 +489,22 @@
         "type": "github"
       }
     },
+    "nixpkgsOlder": {
+      "locked": {
+        "lastModified": 1719918800,
+        "narHash": "sha256-9UoMK9d1PiJZJrInbMONscA7QN8C6kZIX9FUyHp6UqQ=",
+        "owner": "arachnist",
+        "repo": "nixpkgs",
+        "rev": "02e10f7e99522cef9909f78312ffbbd2d96e59c3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "arachnist",
+        "repo": "nixpkgs",
+        "rev": "02e10f7e99522cef9909f78312ffbbd2d96e59c3",
+        "type": "github"
+      }
+    },
     "nixpkgs_2": {
       "locked": {
         "lastModified": 1702272962,
@@ -523,11 +539,11 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1720516678,
-        "narHash": "sha256-8cRCodATGFhup7ivASjOqekIgAUY8d2tX0XzvYPuCGU=",
+        "lastModified": 1720542264,
+        "narHash": "sha256-5DaslaU9rl6nJyRzZlVwTVvN8tMA8ec6AM1NDWDSJS8=",
         "owner": "arachnist",
         "repo": "nixpkgs",
-        "rev": "72ee32ccaebb8f666582930972940345d93f37ac",
+        "rev": "8eb7f26d11fd482370287f2960d09076029a19a0",
         "type": "github"
       },
       "original": {
@@ -608,6 +624,7 @@
         "lix-module": "lix-module",
         "nix-formatter-pack": "nix-formatter-pack",
         "nixpkgs": "nixpkgs_4",
+        "nixpkgsOlder": "nixpkgsOlder",
         "simple-nixos-mailserver": "simple-nixos-mailserver"
       }
     },

flake.nix

@@ -3,6 +3,7 @@
 
   inputs = {
     nixpkgs.url = "github:arachnist/nixpkgs/ar-patchset-unstable";
+    nixpkgsOlder.url = "github:arachnist/nixpkgs/02e10f7e99522cef9909f78312ffbbd2d96e59c3";
     nix-formatter-pack.url = "github:Gerschtli/nix-formatter-pack";
     deploy-rs.url = "github:serokell/deploy-rs";
     impermanence.url = "github:nix-community/impermanence";

modules/graphical.nix

@@ -3,6 +3,7 @@
 let
   flakes = lib.filterAttrs (name: value: value ? outputs) inputs;
   nixRegistry = builtins.mapAttrs (name: v: { flake = v; }) flakes;
+  pkgsOlder = import inputs.nixpkgsOlder { system = pkgs.system; config.allowUnfree = true; };
   # rfkill block 0; rmmod btusb btintel; systemctl restart bluetooth.service; modprobe btintel; modprobe btusb; systemctl restart bluetooth.service; rfkill unblock 0
   bt-unfuck = with pkgs;
     writeScriptBin "bt-unfuck" ''
@@ -172,6 +173,9 @@ in {
     kate
     kolourpaint
     okular
+  ]) ++ (with pkgsOlder; [
+    freecad
+    neofetch
   ]) ++ (with pkgs; [
     chromium
     ffmpeg-full
@@ -200,7 +204,6 @@ in {
     libreoffice-qt6
 
     glasgow
-    # freecad
 
     easyeffects