output '/nix/store/jla837w8gwpf6aiy56ippajblmh7xkip-stdenv-darwin' is not allowed to refer to the following paths:
  /nix/store/2v7gipzb3m8fbk5ai13kj8vyqds56m48-gnum4-1.4.18
  /nix/store/jpn9q1j0wxr8nkq2k28k1qvc5smb6hbn-bison-3.3.2

   Compiling version_check v0.1.5
   Compiling rustc-ap-graphviz v306.0.0
error[E0277]: the trait bound `std::borrow::Cow<'_, str>: std::convert::From<core::str::EscapeDefault<'_>>` is not satisfied
   --> /build/rustfmt-1.0.1-vendor/rustc-ap-graphviz/lib.rs:551:44
    |
551 |                     (&*s).escape_default().into()
    |                                            ^^^^ the trait `std::convert::From<core::str::EscapeDefault<'_>>` is not implement>
    |
    = help: the following implementations were found:
              <std::borrow::Cow<'a, [T]> as std::convert::From<&'a [T]>>
              <std::borrow::Cow<'a, [T]> as std::convert::From<&'a std::vec::Vec<T>>>
              <std::borrow::Cow<'a, [T]> as std::convert::From<std::vec::Vec<T>>>
              <std::borrow::Cow<'a, std::ffi::CStr> as std::convert::From<&'a std::ffi::CStr>>
            and 11 others
    = note: required because of the requirements on the impl of `std::convert::Into<std::borrow::Cow<'_, str>>` for `core::str::Esc>

error: aborting due to previous error