From de12dd74d20baa343ad631e6089de8777cbbced1 Mon Sep 17 00:00:00 2001
From: Melvyn <melvyn2@dnsense.pub>
Date: Fri, 8 Dec 2023 14:01:35 -0800
Subject: [PATCH] nixos/sshServe: use bash as default shell for nix-ssh user

Using the user-set default shell (which is intended for non-system users) for the nix-ssh user can lead to unpredictable behavior, such as `fish` complaining about the unwritable home directory on every connection. Bash is guaranteed to be available and work as expected, so explicitly use it instead.
---
 nixos/modules/services/misc/nix-ssh-serve.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/nixos/modules/services/misc/nix-ssh-serve.nix b/nixos/modules/services/misc/nix-ssh-serve.nix
index b656692ca01c..cf9d6339c69b 100644
--- a/nixos/modules/services/misc/nix-ssh-serve.nix
+++ b/nixos/modules/services/misc/nix-ssh-serve.nix
@@ -1,4 +1,4 @@
-{ config, lib, ... }:
+{ config, lib, pkgs, ... }:
 
 with lib;
 let cfg = config.nix.sshServe;
@@ -46,7 +46,7 @@ in {
       description = "Nix SSH store user";
       isSystemUser = true;
       group = "nix-ssh";
-      useDefaultShell = true;
+      shell = pkgs.bashInteractive;
     };
     users.groups.nix-ssh = {};