Build fails on rustc 1.29.0-nightly (1ecf6929d 2018-07-16)

[lambda-fairy]

error: cannot find macro `quote!` in this scope
  --> maud_macros/src/lib.rs:47:5
   |
47 |     quote!({
   |     ^^^^^
error: cannot find macro `quote!` in this scope
  --> maud_macros/src/generate.rs:67:21
   |
67 |                     quote!($head $body)
   |                     ^^^^^
error: cannot find macro `quote!` in this scope
  --> maud_macros/src/generate.rs:83:9
   |
83 |         quote!({
   |         ^^^^^
error: cannot find macro `quote!` in this scope
   --> maud_macros/src/generate.rs:140:25
    |
140 |                         quote!($head { $body })
    |                         ^^^^^
error: cannot find macro `quote!` in this scope
   --> maud_macros/src/generate.rs:149:9
    |
149 |         quote!($head $body)
    |         ^^^^^
error: cannot find macro `quote!` in this scope
   --> maud_macros/src/generate.rs:154:9
    |
154 |         quote!($head $body)
    |         ^^^^^
error: cannot find macro `quote!` in this scope
   --> maud_macros/src/generate.rs:224:5
    |
224 |     quote!(if $cond)
    |     ^^^^^
error: cannot find macro `quote!` in this scope
   --> maud_macros/src/generate.rs:265:13
    |
265 |             quote!($output_ident.push_str($string);)
    |             ^^^^^
error[E0603]: module `quote` is private
 --> maud_macros/src/generate.rs:6:5
  |
6 |     quote,
  |     ^^^^^
error[E0603]: module `quote` is private
  --> maud_macros/src/lib.rs:20:5
   |
20 | use proc_macro::quote;
   |     ^^^^^^^^^^^^^^^^^
error: aborting due to 10 previous errors

Might be caused by rust-lang/rust#52081. If that's the case, then a #![feature] flag should fix things.