nixos/ssh: inline askPassword

nixos/modules/programs/ssh.nix

@@ -8,14 +8,12 @@ let
 
   cfg  = config.programs.ssh;
 
-  askPassword = cfg.askPassword;
-
   askPasswordWrapper = pkgs.writeScript "ssh-askpass-wrapper"
     ''
       #! ${pkgs.runtimeShell} -e
       export DISPLAY="$(systemctl --user show-environment | ${pkgs.gnused}/bin/sed 's/^DISPLAY=\(.*\)/\1/; t; d')"
       export WAYLAND_DISPLAY="$(systemctl --user show-environment | ${pkgs.gnused}/bin/sed 's/^WAYLAND_DISPLAY=\(.*\)/\1/; t; d')"
-      exec ${askPassword} "$@"
+      exec ${cfg.askPassword} "$@"
     '';
 
   knownHosts = attrValues cfg.knownHosts;
@@ -351,7 +349,7 @@ in
         fi
       '';
 
-    environment.variables.SSH_ASKPASS = optionalString cfg.enableAskPassword askPassword;
+    environment.variables.SSH_ASKPASS = optionalString cfg.enableAskPassword cfg.askPassword;
 
   };
 }