make sure zsh editor config can be materialised on mac

nixos/boxes/cushy/README.md

@@ -1,2 +1,3 @@
 https://discourse.nixos.org/t/ssl-ca-cert-error-on-macos/31171/6
 
+`nix run nix-darwin -- switch --flake '.#cushy'`

nixos/boxes/cushy/default.nix

@@ -21,6 +21,12 @@ in {
       inherit config;
       cyplo.username = username;
     })
+    (import ../../helix {
+      inherit pkgs;
+      inherit lib;
+      inherit config;
+      cyplo.username = username;
+    })
   ];
   services.nix-daemon.enable = true;
 

nixos/helix/default.nix

@@ -2,8 +2,16 @@
   config,
   pkgs,
   lib,
+  cyplo,
   ...
-}: {
+}: 
+let
+  username =
+    if cyplo ? username
+    then "${cyplo.username}"
+    else "cyryl";
+in
+{
   nix.settings = {
     trusted-substituters = [
       "https://helix.cachix.org"
@@ -12,5 +20,5 @@
       "helix.cachix.org-1:ejp9KQpR1FBI2onstMQ34yogDm4OgU2ru6lIwPvuCVs="
     ];
   };
-  home-manager.users.cyryl = {...}: {imports = [./home.nix];};
+  home-manager.users."${username}" = {...}: {imports = [./home.nix];};
 }

nixos/helix/home.nix

@@ -14,8 +14,8 @@ in {
     VISUAL = lib.mkForce helix;
   };
   programs.zsh.sessionVariables = {
-    EDITOR = lib.mkForce helix;
-    VISUAL = lib.mkForce helix;
+    EDITOR = helix;
+    VISUAL = helix;
   };
   systemd.user.sessionVariables = {
     EDITOR = lib.mkForce helix;