Allow setting wsl default user in the default nix config of the generated tarball

Author: jbury

.github/workflows/run_tests.yml

@@ -46,6 +46,7 @@ jobs:
       - name: Setup WSL 🐧
         run: |
           wsl --update
+          Get-Command wsl
           wsl --version
 
       - name: Execute Test 🧪

modules/build-tarball.nix

@@ -30,7 +30,7 @@ let
       ];
 
       wsl.enable = true;
-      wsl.defaultUser = "nixos";
+      wsl.defaultUser = "${config.wsl.defaultUser}";
 
       # This value determines the NixOS release from which the default
       # settings for stateful data, like file locations and database versions