Distuingish between configurations and program modifications

programs/ssh/default.nix

@@ -1,15 +1,16 @@
-{ ... }:
+{ pkgs }:
 
-{
-  home-manager.users.charlotte = { ... }: {
-    programs.ssh = {
-      enable = true;
-      compression = true;
-      hashKnownHosts = true;
-      serverAliveInterval = 300;
-      extraConfig = ''
-        HostKeyAlgorithms ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
-      '';
-    };
-  };
+pkgs.symlinkJoin {
+  name = "openssh";
+  paths = [
+    (
+      pkgs.writeScriptBin "ssh" ''
+        #!${pkgs.zsh}/bin/zsh
+
+        export TERM=xterm-256color
+        ${pkgs.openssh}/bin/ssh $@
+      ''
+    )
+    pkgs.openssh
+  ];
 }