tcptrack is Linux only

modules/baseline.nix

@@ -31,7 +31,8 @@
     };
 
     # Base packages that need to be in all my hosts
-    environment.systemPackages = with pkgs; [
+    environment.systemPackages = with pkgs; lib.mkMerge [
+	[
 		agenix
 		android-file-transfer
 		bitwarden-cli
@@ -50,9 +51,12 @@
 		nano
 		pciutils
 		pwgen
-        tcptrack
 		transcrypt
 		unzip
 		wget
+	]
+	(lib.optional pkgs.stdenv.isLinux [
+		tcptrack
+	])
     ];
 }