Symlinks created via the home-manager module are broken about impermanence

[Janrupf]

Temporary fix:

  home.activation.createTargetFileDirectoriesFixup =
  let
    isSymlink = entry: (!lib.isString entry) && (entry.method == "symlink");
    entryPath = entry: if lib.isString entry then entry else entry.directory;

    cfg = config.home.persistence;

    persistenceRoots = lib.attrNames cfg;
    mkdirPersistentLocations = map (root:
      let
        persistentDiskPath = cfg.${root}.persistentStoragePath;
        persistentDirectories = 
          # Collect all directories which are symlinks
          (map entryPath (lib.filter isSymlink cfg.${root}.directories)) ++
          # And all directories of files
          (map lib.dirOf (map entryPath (cfg.${root}.files)));
        
        completePaths = map (path: lib.path.append (/. + root) path) persistentDirectories;
        mkdirCommands = lib.concatMapStrings (completePath: "run mkdir -p ${lib.escapeShellArg completePath}\n") completePaths;
      in ''
        # mkdir's for ${root}

        ${mkdirCommands}
      ''
    ) persistenceRoots;
  in
    config.lib.dag.entryBetween [ "writeBoundary" ] [ "createTargetFileDirectories" ] (
      lib.concatMapStrings (cmds: "${cmds}\n") mkdirPersistentLocations
    );

This should create all directories as intended when put into the home-manager configuration.