Make tramp work correctly with a NixOS VM

The VM is running on a Windows host and I connect from a WSL1 environment to
it. For some reason this required these changes even though I can connect
perfectly fine from my NixOS notebook to other NixOS based systems.

home-manager/modules/programs/emacs/emacs.d/lib/az_various.el

@@ -45,8 +45,9 @@
 ;; enable mouse support in the terminal
 (xterm-mouse-mode 1)
 
-;; For better performance use "ssh" instead of "scp"
-(setq tramp-default-method "ssh")
+(use-package tramp
+  :config
+  (add-to-list 'tramp-remote-path 'tramp-own-remote-path))
 
 ;; Prompt when quitting Emacs
 (setq confirm-kill-emacs 'yes-or-no-p)

home-manager/modules/programs/emacs/emacs.d/lib/az_vterm.el

@@ -3,6 +3,7 @@
   :bind
   ([f2] . projectile-run-vterm)
   :config
+  (add-to-list 'vterm-tramp-shells '("sshx" "/usr/bin/env bash") '("ssh" "/usr/bin/env bash"))
   (setq vterm-kill-buffer-on-exit t
         vterm-disable-bold t)
   (evil-set-initial-state 'vterm-mode 'emacs))