diff --git a/hardware/gpu/cuda.nix b/hardware/gpu/cuda.nix
index 1b68b16..a838a7b 100644
--- a/hardware/gpu/cuda.nix
+++ b/hardware/gpu/cuda.nix
@@ -88,7 +88,18 @@ lib.mkMerge [
 
   environment.systemPackages = [
     (pkgs.nvtopPackages.nvidia or pkgs.nvtop-nvidia)
-  ] ++ lib.optionals config.hardware.nvidia.prime.offload.enable [
+  ];
+
+}
+# (lib.optionalAttrs (lib.versionAtLeast (lib.versions.majorMinor lib.version) "25.11") {
+#   hardware.nvidia.prime.offload = {
+#     enableOffloadCmd = config.hardware.nvidia.prime.offload.enable;
+#     offloadCmdMainProgram = "prime-run";
+#   };
+# })
+# (lib.optionalAttrs (lib.versionOlder (lib.versions.majorMinor lib.version) "25.11") {
+{
+  environment.systemPackages = lib.optionals config.hardware.nvidia.prime.offload.enable [
     (pkgs.writeShellScriptBin "prime-run" ''
       export __NV_PRIME_RENDER_OFFLOAD=1
       export __NV_PRIME_RENDER_OFFLOAD_PROVIDER=NVIDIA-G0
@@ -105,6 +116,9 @@ lib.mkMerge [
     #  exec "$@"
     #'')
   ];
+# })
+}
+{
 
   # nvidia bad
   nixpkgs.config.packageOverrides = pkgs: {
diff --git a/users/pbsds/home/profiles/bashrc.d/nix-fd.sh b/users/pbsds/home/profiles/bashrc.d/nix-fd.sh
index f842751..5f5d321 100644
--- a/users/pbsds/home/profiles/bashrc.d/nix-fd.sh
+++ b/users/pbsds/home/profiles/bashrc.d/nix-fd.sh
@@ -64,3 +64,8 @@ nix-fd() { _nix_fd "nix" "$@"; }
 if command -v nom >/dev/null; then
   nom-fd() { _nix_fd "nom" "$@"; }
 fi
+
+nixfd() {
+  echo >&2 "did you mean 'nix-fd'?"
+  false
+}
diff --git a/users/pbsds/home/profiles/bashrc.d/nix-shell.sh b/users/pbsds/home/profiles/bashrc.d/nix-shell.sh
index 7266aa2..8d27378 100644
--- a/users/pbsds/home/profiles/bashrc.d/nix-shell.sh
+++ b/users/pbsds/home/profiles/bashrc.d/nix-shell.sh
@@ -170,3 +170,8 @@ ne() {
   printf >&2 "+ cd %q\n" "$storepath"
   cd "$storepath"
 }
+
+# TODO: add a 'enable-unfree' command which switches the NIX_CONFIG with a file
+# where https://nix.dev/manual/nix/2.26/command-ref/conf-file#conf-impure-env is
+# set with NIXPKGS_ALLOW_UNFREE.
+# blocked on lix support for the option