diff --git a/flake.lock b/flake.lock
index 327adcf..2af0c26 100644
--- a/flake.lock
+++ b/flake.lock
@@ -187,11 +187,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1710408871,
-        "narHash": "sha256-YpSGYZR96I8g5OK/Fdm0O4+mHLen6YPA1cPanqqNqT0=",
+        "lastModified": 1710470187,
+        "narHash": "sha256-l2R47RqhdEUYrMrQjdFKhxtqprkJjIE89qJx3iEVv+U=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "bd5ddf2c6bfafff031edf80221e1ee94e86ca10a",
+        "rev": "f242fc768bdfcf91d9094a8a8f66551324bf1a47",
         "type": "github"
       },
       "original": {
diff --git a/justfile b/justfile
index 80de38c..6b777f3 100644
--- a/justfile
+++ b/justfile
@@ -1,6 +1,9 @@
 set export
 
 config := "machines/$(hostname)/configuration.nix"
+arch := `uname s`
+
+cmd := if arch == "Linux" { "nixos-rebuild" } else { "darwin-rebuild" }
 
 build-linux:
   nixos-rebuild --use-remote-sudo -I nixos-config=$config switch --flake .