error[E0477]: the type `futures::AndThen<futures::Join<futures::MapErr<std::boxed::Box<futures::Future<Error=std::io::Error, Item=std::vec::Vec<std::option::Option<fs::PathStat>>> + std::marker::Send>, [closure@process_execution/src/local.rs:57:42: 57:90]>, futures::MapErr<std::boxed::Box<futures::Future<Error=std::io::Error, Item=std::vec::Vec<fs::PathStat>> + std::marker::Send>, [closure@process_execution/src/local.rs:53:41: 53:88]>>, std::boxed::Box<futures::Future<Error=std::string::String, Item=fs::Snapshot> + std::marker::Send>, [closure@process_execution/src/local.rs:60:17: 75:8 self:&&local::CommandRunner, posix_fs:std::sync::Arc<fs::PosixFS>]>` does not fulfill the required lifetime
  --> process_execution/src/local.rs:75:10
   |
75 |       }).to_boxed()
   |          ^^^^^^^^
   |
   = note: type must satisfy the static lifetime`