diff --git a/flake.nix b/flake.nix
index ba08853..339b028 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,7 +6,7 @@
     nixpkgs-test.url = "github:NixOS/nixpkgs/refs/pull/379645/merge"; # for testing
     nixpkgs-edge.url = "https://nixos.org/channels/nixos-unstable/nixexprs.tar.xz"; # len("edge") == 4
     nixpkgs-2505.url = "https://nixos.org/channels/nixos-25.05/nixexprs.tar.xz";
-    nixpkgs-2411.url = "https://nixos.org/channels/nixos-24.11/nixexprs.tar.xz";
+    nixpkgs-2411.url = "https://nixos.org/channels/nixos-24.11/nixexprs.tar.xz"; # for old docs
     nixpkgs-2405.url = "https://nixos.org/channels/nixos-24.05/nixexprs.tar.xz"; # for old docs
     nixpkgs-2311.url = "https://nixos.org/channels/nixos-23.11/nixexprs.tar.xz"; # for old docs
     nixpkgs-2305.url = "https://nixos.org/channels/nixos-23.05/nixexprs.tar.xz"; # for old docs
@@ -309,7 +309,7 @@
       envrc         = mkShell { } envrc-pkgs;
       envrc-remotes = mkShell { } (envrc-pkgs ++ [
         pkgs.remote-exec
-        pkgs.yq
+        pkgs.yq # TODO: remove
         pkgs.rsync
       ]);
       remoteenv = mkShell { } [
diff --git a/hardware/gpu/cuda-common.nix b/hardware/gpu/cuda-common.nix
index 147f8ca..4aa9df4 100644
--- a/hardware/gpu/cuda-common.nix
+++ b/hardware/gpu/cuda-common.nix
@@ -21,11 +21,7 @@ lib.mkMerge [
 })
 {
 
-  nixpkgs.config.openglSupport = true; # why is this not set by hardware.opengl.enable ?
-  nixpkgs.config.cudaSupport   = true;
-  nixpkgs.config.vdpauSupport  = true;
-  nixpkgs.config.vaapiSupport  = true;
-  nixpkgs.config.nvidiaSupport = true;
+  nixpkgs.config.cudaSupport= true;
 
   nixpkgs.config.allowUnfreePredicate =
     pkg:
@@ -39,6 +35,16 @@ lib.mkMerge [
       (lib.hasInfix "cublas" pkgname)
     ];
 
+  # avoid expensive rebuilds
+  nixpkgs.config.packageOverrides = pkgs: {
+    firefox-unwrapped = pkgs.firefox-unwrapped.override (old: {
+      onnxruntime = old.onnxruntime.override {
+        cudaSupport = false;
+        ncclSupport = false;
+      };
+    });
+  };
+
 }
 /* lib.mkIf (lib.versionAtLeast lib.version "24.11") { */
 (lib.optionalAttrs (lib.versionAtLeast lib.version "24.11") {
diff --git a/hosts/nixos/garp/configuration.nix b/hosts/nixos/garp/configuration.nix
index be369ae..96f0997 100644
--- a/hosts/nixos/garp/configuration.nix
+++ b/hosts/nixos/garp/configuration.nix
@@ -27,12 +27,13 @@
     inputs.nixos-hardware.nixosModules.common-pc-ssd
     inputs.nixos-hardware.nixosModules.common-cpu-intel-cpu-only
     ../../../hardware/gpu/cuda.nix
+    ../../../hardware/gpu/zluda.nix
 
     ../../../profiles/nix-ld.nix
     ../../../profiles/sshd
     ../../../profiles/nix-cgroups.nix
     #../../../profiles/no-suspend.nix
-    #../../../profiles/oci/podman.nix
+    # ../../../profiles/oci/podman.nix
     ../../../profiles/oci/docker.nix
 
     ../../../users/pbsds
diff --git a/hosts/nixos/nord/configuration.nix b/hosts/nixos/nord/configuration.nix
index 539e13f..a52610e 100644
--- a/hosts/nixos/nord/configuration.nix
+++ b/hosts/nixos/nord/configuration.nix
@@ -19,6 +19,16 @@
   systemd.services."getty@tty1".enable = false;
   systemd.services."autovt@tty1".enable = false;
 
+  # for testing only, not for building
+  # boot.binfmt.addEmulatedSystemsToNixSandbox = false;
+  # boot.binfmt.emulatedSystems = [
+  #   # "armv7l-linux"
+  #   # "aarch64-linux"
+  #   # "riscv64-linux"
+  #   "i686-windows"
+  #   "x86_64-windows"
+  # ];
+
   imports = [
     ./hardware-configuration.nix
     inputs.nixos-hardware.nixosModules.common-pc
diff --git a/hosts/nixos/sopp/configuration.nix b/hosts/nixos/sopp/configuration.nix
index fa18b9f..1db94c3 100644
--- a/hosts/nixos/sopp/configuration.nix
+++ b/hosts/nixos/sopp/configuration.nix
@@ -50,6 +50,7 @@
     inputs.nixos-hardware.nixosModules.common-cpu-intel
     ../../../hardware/gpu/intel.nix
     ../../../hardware/gpu/cuda.nix
+    ../../../hardware/gpu/zluda.nix
     ../../../hardware/printer/hp-laserjet-p1005.nix
     ../../../hardware/printer/share.nix
 
@@ -88,14 +89,14 @@
   hardware.bluetooth.enable = true;
 
   environment.systemPackages = [
-    pkgs.davinci-resolve
+    # pkgs.davinci-resolve # broken on cuda
     pkgs.krita
-    pkgs.pbsds.v4l2-play
-    pkgs.librealsense-gui
-    pkgs.freecad
+    # pkgs.pbsds.v4l2-play
+    # pkgs.librealsense-gui
+    # pkgs.freecad
     pkgs.chromium
-    pkgs.cemu
-    pkgs.azahar # citra
+    # pkgs.cemu
+    # pkgs.azahar # citra
   ];
 
 
diff --git a/justfile b/justfile
index a032685..3725bf8 100644
--- a/justfile
+++ b/justfile
@@ -126,12 +126,12 @@ home-why-depends $attrpath:
     .#nixosConfigurations."${hostname}".config.home-manager.users."${username}".home.activationPackage \
     .#nixosConfigurations."${hostname}".pkgs."$attrpath"
 
-home-eval:
+home-eval attrpath="home.activationPackage" *_:
   #!/usr/bin/env -S bash -euo pipefail
   hostname="$(hostname)"
   username="$(whoami)"
   set -x
-  nix eval --log-format raw .#nixosConfigurations."${hostname}".config.home-manager.users."${username}".home.activationPackage
+  nix eval --log-format raw .#nixosConfigurations."${hostname}".config.home-manager.users."${username}"."$attrpath" --show-trace "${@:2}"
   # TODO: fallback to .#homeConfigurations.$(whoami) ?
   # TODO: alternative behaviour for system-manager and nix-darwin
 
diff --git a/profiles/desktop/steam.nix b/profiles/desktop/steam.nix
index e435c68..bc23b82 100644
--- a/profiles/desktop/steam.nix
+++ b/profiles/desktop/steam.nix
@@ -1,5 +1,4 @@
-{ config, pkgs, lib, ... }:
-lib.mkMerge [
+{ pkgs, lib, ... }:
 {
 	programs.steam.enable = true;
   programs.steam.remotePlay.openFirewall = true; # Open ports in the firewall for Steam Remote Play
@@ -14,14 +13,6 @@ lib.mkMerge [
     "steam-runtime"
   ];
 
-  environment.systemPackages = [
-    # ((pkgs.steam-run.override {
-    #   steam-unwrapped = null;
-    # }).overrideAttrs {
-    #   name = "fhs-run";
-    # })
-  ];
-
   programs.bash.shellInit = ''
     if [ -n "''${BASH_VERSION:-}" ]; then
       complete -F _command steam-run
@@ -81,29 +72,23 @@ lib.mkMerge [
 
 	#services.joycond.enable = true;
 
-}
-(lib.optionalAttrs (lib.versionOlder lib.version "24.11") {
-  hardware.opengl.enable = true;
-  hardware.opengl.driSupport = true;
-  hardware.opengl.driSupport32Bit = true;
-  hardware.opengl.extraPackages32 = with pkgs.pkgsi686Linux; [ libva ];
-})
-(lib.optionalAttrs (lib.versionAtLeast lib.version "24.11") {
   hardware.graphics.enable = true;
   hardware.graphics.enable32Bit = true;
   hardware.graphics.extraPackages32 = with pkgs.pkgsi686Linux; [ libva ];
-})
-{
 
   environment.systemPackages = with pkgs; [
-    steam-tui
+    # steam-tui
     steamcmd
+
     #winetricks
     #protontricks
 
-    wineWowPackages.full
+    # wineWowPackages.full
     #wineWowPackages.waylandFull
 
+    # bottles
+    # lutris
+
     # nice to have
     jstest-gtk
     antimicrox
@@ -119,4 +104,3 @@ lib.mkMerge [
   ];
 
 }
-]
diff --git a/profiles/nix-ld.nix b/profiles/nix-ld.nix
index 197ab76..8f9cf26 100644
--- a/profiles/nix-ld.nix
+++ b/profiles/nix-ld.nix
@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ lib, pkgs, ... }:
 
 # TODO:
 # this is what i currently do to use conda/pypi with nix-ld:
@@ -10,6 +10,14 @@
 {
   programs.nix-ld.enable = true;
 
+  # environment.sessionVariables = {
+  #   NIX_LD_LIBRARY_PATH = lib.mkForce (lib.concatStringsSep ":" [
+  #     "/run/opengl-driver/lib"
+  #     "/run/opengl-driver-32/lib"
+  #     "/run/current-system/sw/share/nix-ld/lib"
+  #   ]);
+  # };
+
   programs.nix-ld.libraries = with pkgs; [
     acl
     at-spi2-atk
diff --git a/users/pbsds/home/profiles/shell.nix b/users/pbsds/home/profiles/shell.nix
index da79b36..09f3e2a 100644
--- a/users/pbsds/home/profiles/shell.nix
+++ b/users/pbsds/home/profiles/shell.nix
@@ -231,8 +231,14 @@ in
     # comby # ast-based source code rewrite
     gron fastgron # grep-able json
     jq # json query
-    # xq gojq  # faster jq alternatives
-    yq # jq wrapper with more formats, includes yq (yaml), xq (xml) and tomlq
+    xq gojq  # faster jq alternatives
+    # yq # jq wrapper with more formats, includes yq (yaml), xq (xml) and tomlq
+    (pkgs.linkFarm yq {
+      # jq wrapper with more formats, includes yq (yaml), xq (xml) and tomlq
+      "bin/yq" = lib.getExe' pkgs.yq "yq";
+      "bin/tomlq" = lib.getExe' pkgs.yq "tomlq";
+      # "bin/xq" = lib.getExe' pkgs.yq "xq"; # conflict with the speedy xq
+    })
     fx # jq tui viewer
     ijq # interactive jq
     #fq # jq for binaries