fix: strip perl-ldap from john deps in cross-compile overlay

flake.nix

@@ -83,6 +83,13 @@
             export PKG_CONFIG_PATH="${prev.buildPackages.hyprwayland-scanner}/lib/pkgconfig:$PKG_CONFIG_PATH"
           '';
         });
+        # perl-ldap fails cross-compile (Module::Install needs dynamic loading)
+        # Strip it from john deps -- the perl scripts that need it are not critical
+        john = prev.john.overrideAttrs (old: {
+          propagatedBuildInputs = builtins.filter
+            (x: x?pname && x.pname != "perl-ldap")
+            (old.propagatedBuildInputs or []);
+        });
       };
 
       uconsoleRpiPipewireOverlay = final: prev: {