# File "src/stdio.ml", line 5, characters 21-32:
# 5 | module Out_channel = Out_channel
#                          ^^^^^^^^^^^
# Alert deprecated: module Base.Out_channel
# [2016-09] this element comes from the stdlib distributed with OCaml.
# Referring to the stdlib directly is discouraged by Base. You should either
# use the equivalent functionality offered by Base, or if you really want to
# refer to the stdlib, use Caml.Out_channel instead
# File "src/stdio.ml", line 11, characters 20-39:
# 11 | let eprintf       = Out_channel.eprintf
#                          ^^^^^^^^^^^^^^^^^^^
# Error: Unbound value Out_channel.eprintf

diff --git a/dune-project b/dune-project
index eb10bcb..c2e4660 100644
--- a/dune-project
+++ b/dune-project
@@ -1 +1 @@
-(lang dune 1.10)
\ No newline at end of file
+(lang dune 2.8)
diff --git a/src/dune b/src/dune
index dc5a9e2..90cae31 100644
--- a/src/dune
+++ b/src/dune
@@ -1,5 +1,6 @@
 (library (name stdio) (public_name stdio) (libraries base base.caml)
  (preprocess no_preprocessing)
+ (root_module Root)
  (lint
   (pps ppx_base -check-doc-comments -type-conv-keep-w32=impl
-   -apply=js_style,type_conv)))
\ No newline at end of file
+   -apply=js_style,type_conv)))
diff --git a/src/stdio.ml b/src/stdio.ml
index b33f377..c78bb1f 100644
--- a/src/stdio.ml
+++ b/src/stdio.ml
@@ -2,7 +2,7 @@ open! Base
 open! Import
 
 module In_channel  = In_channel
-module Out_channel = Out_channel
+module Out_channel = Root.Out_channel

### output ###
# [...]
# Re-raised at Stdune__exn.raise_with_backtrace in file "src/stdune/exn.ml"
#   (inlined), line 36, characters 27-56
# Called from Stdune__exn_with_backtrace.reraise in file
#   "src/stdune/exn_with_backtrace.ml", line 13, characters 33-71
# Called from Fiber.Execution_context.forward_exn_with_bt in file
#   "src/fiber/fiber.ml", line 138, characters 10-17
# 
# I must not crash.  Uncertainty is the mind-killer. Exceptions are the
# little-death that brings total obliteration.  I will fully express my cases. 
# Execution will pass over me and through me.  And when it has gone past, I
# will unwind the stack along its path.  Where the cases are handled there will
# be nothing.  Only I will remain.

$ git clone https://github.com/ocaml-bench/sandmark.git
$ cd sandmark
$ git fetch origin pull/257/head:PR-257
$ git checkout PR-257
$  make clean; TAG='"run_in_ci"' make run_config_filtered.json 
$ RUN_CONFIG_JSON=run_config_filtered.json make ocaml-versions/4.14.0+trunk.bench