「opam install utop」を実行すると、fedora 25 に utop をインストールする際にエラーが発生します。コマンドを初めて実行したとき、いくつかのパッケージがインストールされましたが、すべてではありませんでした。同じコマンドをもう一度実行したところ、以下のエラー メッセージが表示されました。なにか提案を？
The following actions will be performed:
- install lambda-term 1.12.0 [required by utop]
- install utop 2.0.2
===== 2 to install =====
Do you want to continue ? [Y/n] y
=-=- Gathering sources =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[lambda-term] Archive in cache
[utop] Archive in cache
=-=- Processing actions -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
[ERROR] The compilation of lambda-term failed at "jbuilder build -p lambda-term
-j 4".
#=== ERROR while installing lambda-term.1.12.0 ================================#
# opam-version 1.2.2
# os linux
# command jbuilder build -p lambda-term -j 4
# path /home/se/.opam/4.05.0/build/lambda-term.1.12.0
# compiler 4.05.0
# exit-code 1
# env-file /home/se/.opam/4.05.0/build/lambda-term.1.12.0/lambda-term-1999-58c514.env
# stdout-file /home/se/.opam/4.05.0/build/lambda-term.1.12.0/lambda-term-1999-58c514.out
# stderr-file /home/se/.opam/4.05.0/build/lambda-term.1.12.0/lambda-term-1999-58c514.err
### stderr ###
# Warning 3: deprecated: module Lwt_sequence
# [...]
# File "src/lTerm_widget_callbacks.ml", line 48, characters 2-21:
# Warning 3: deprecated: module Lwt_sequence
# This module is an implementation detail of Lwt. See
# https://github.com/ocsigen/lwt/issues/361
# ocamlc src/lTerm_unix.{cmo,cmt} (exit 2)
# (cd _build/default && /home/se/.opam/4.05.0/bin/ocamlc.opt -w -40 -safe-string -g -bin-annot -I /home/se/.opam/4.05.0/lib/bytes -I /home/se/.opam/4.05.0/lib/camomile -I /home/se/.opam/4.05.0/lib/lwt -I /home/se/.opam/4.05.0/lib/lwt_react -I /home/se/.opam/4.05.0/lib/ocaml -I /home/se/.opam/4.05.0/lib/ocaml/threads -I /home/se/.opam/4.05.0/lib/react -I /home/se/.opam/4.05.0/lib/result -I /home/se/.opam/4.05.0/lib/zed -no-alias-deps -I src -o src/lTerm_unix.cmo -c -impl src/lTerm_unix.ml)
# File "src/lTerm_unix.ml", line 342, characters 32-51:
# Error: This expression has type bytes but an expression was expected of type
# string
=-=- Error report -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
The following actions were aborted
- install utop 2.0.2
The following actions failed
- install lambda-term 1.12.0
No changes have been performed