diff --git a/.github/workflows/nix-test.yaml b/.github/workflows/nix-test.yaml
index e4080ef..5f733e7 100644
--- a/.github/workflows/nix-test.yaml
+++ b/.github/workflows/nix-test.yaml
@@ -35,6 +35,7 @@ jobs:
           sed -i '' "s/defaultHostname/$(scutil --get LocalHostName)/g" nixos-config/flake.nix
           sed -i '' "s/mike.splain/runner/g" nixos-config/flake.nix
           sed -i '' "s/defaultSystem/${{matrix.os.arch}}/g" nixos-config/flake.nix
+          sed -i '' "s/defaultVersion/$(sw_vers --productVersion | cut -d. -f1)/g" nixos-config/flake.nix
 
           sudo mv /etc/nix/nix.conf /etc/nix/nix.conf.before-nix-darwin
           sudo mv /etc/shells /etc/shells.before-nix-darwin
diff --git a/nixos-config/flake.nix b/nixos-config/flake.nix
index efefd89..9aedf64 100644
--- a/nixos-config/flake.nix
+++ b/nixos-config/flake.nix
@@ -93,7 +93,7 @@
       extraSpecialArgs = { inherit inputs user pwnvim; };
       users.${user.name} = { imports = [ ./home ]; };
     };
-    system = { system, hostName }: let
+    system = { system, hostName, osVersion }: let
       inherit (nixpkgs.lib.strings) hasInfix;
       platform = {
         isDarwin = hasInfix "darwin" system;
@@ -120,7 +120,7 @@
           #   home-manager = configuration.homeManager;
           # }
         ];
-      specialArgs = { inherit inputs hostName platform system user; };
+      specialArgs = { inherit inputs hostName osVersion platform system user; };
     in if platform.isDarwin
       then nix-darwin.lib.darwinSystem {
         inherit system modules specialArgs;
@@ -172,11 +172,13 @@
       SNS005454 = configuration.system {
         system = "aarch64-darwin";
         hostName = "SNS005454";
+        osVersion = "14";
         # username = "mike.splain";
       };
       defaultHostname = configuration.system {
         system = "defaultSystem";
         hostName = "defaultHostname";
+        osVersion = "defaultVersion";
         # username = "mike.splain";
       };
 
diff --git a/nixos-config/platforms/darwin/homebrew/default.nix b/nixos-config/platforms/darwin/homebrew/default.nix
index 065d07b..15e1942 100644
--- a/nixos-config/platforms/darwin/homebrew/default.nix
+++ b/nixos-config/platforms/darwin/homebrew/default.nix
@@ -1,4 +1,4 @@
-{ inputs, lib, user, hostName, ...}:
+{ inputs, lib, user, hostName, osVersion, ...}:
 let
   inherit (inputs)
     homebrew-cask
@@ -18,10 +18,13 @@ in
       # "Sonos-Inc/pdsw-engx-devops-sk8s/sk8s"
       "ncdu"
     ];
-    casks = [
+    casks = (if osVersion >= "14" then
+    [
+      "jordanbaird-ice"
+    ] else []) ++
+    [
       "session-manager-plugin"
       "appcleaner"
-      "jordanbaird-ice"
     ];
 
     # casks = [];