this is the one I swear the env vars will work

users/blake/dots/desktop/cursor/default.nix

@@ -15,6 +15,12 @@ in {
       default = "Posy_Cursor_Black";
       description = "cursor to use";
     };
+    size = lib.mkOption {
+      type = lib.types.int;
+      default = 64;
+      description = "cursor size to use";
+    };
+
   };
 
   config = lib.mkIf cfg.enable {
@@ -29,6 +35,13 @@ in {
     #      recursive = true;
     #    };
 
+    home.sessionVariables = {
+      XCURSOR_SIZE = cfg.size;
+      XCURSOR_THEME = cfg.cursor;
+      HYPRCURSOR_SIZE = cfg.size;
+      HYPRCURSOR_THEME = cfg.cursor;
+    };
+
     home.pointerCursor = {
       dotIcons.enable = false;
       enable = true;