# Pastebin b3hfE4Wz
let
  inherit (builtins) replaceStrings readFile toFile;
  readTemplate = file: replaceStrings [ "''" ] [ "'''" ] (readFile file);
  nixTemplate = vars: file:
    scopedImport vars (toFile (baseNameOf file) "''${readTemplate file}''");
in
  nixTemplate { title = "hi"; } ./foo.html