Build fail on OCaml 4.13 and/or odoc 2.0

[MisterDA]

I was trying to build the Lwt manual locally, and I got this error. I'm using OCaml 4.13 and odoc 2.0.
Using wikidoc 8c10fd2 (current master).

#=== ERROR while compiling wikidoc.~dev =======================================#
# context     2.0.8 | win32/x86_64 | ocaml-variants.4.13.1+mingw64c | pinned(git+https://github.com/ocsigen/wikidoc.git#8c10fd29)
# path        ~/.opam/ocaml-variants.4.13.1+mingw64c/.opam-switch/build/wikidoc.~dev
# command     C:\OCaml64\bin\make.exe BINDIR=C:/Users/antonin/.opam/ocaml-variants.4.13.1+mingw64c/bin
# exit-code   2
# env-file    ~/.opam/log/wikidoc-6824-a00279.env
# output-file ~/.opam/log/wikidoc-6824-a00279.out
### output ###
# /usr/bin/make -C src/odoc_wiki
# make[1]: Entering directory '/cygdrive/c/Users/antonin/.opam/ocaml-variants.4.13.1+mingw64c/.opam-switch/build/wikidoc.~dev/src/odoc_wiki'
# ocamlfind ocamlc -c -I C:/Users/antonin/.opam/ocaml-variants.4.13.1+mingw64c/lib/ocaml/ocamldoc -I C:/Users/antonin/.opam/ocaml-variants.4.13.1+mingw64c/lib/ocaml/compiler-libs/ -I C:/Users/antonin/.opam/ocaml-variants.4.13.1+mingw64c/lib/ocaml/compiler-libs/parsing -I C:/Users/antonin/.opam/ocaml-variants.4.13.1+mingw64c/lib/ocaml/compiler-libs/typing odoc_import.ml
# File "odoc_import.ml", line 35, characters 23-38:
# 35 |     | Types.Tlink t2 | Types.Tsubst t2 -> need_parent t2
#                             ^^^^^^^^^^^^^^^
# Error: The constructor Types.Tsubst expects 2 argument(s),
#        but is applied here to 1 argument(s)
# make[1]: *** [Makefile:45: odoc_import.cmo] Error 2
# make[1]: Leaving directory '/cygdrive/c/Users/antonin/.opam/ocaml-variants.4.13.1+mingw64c/.opam-switch/build/wikidoc.~dev/src/odoc_wiki'
# make: *** [Makefile.odoc:11: all] Error 2