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otway-rees 8.5.0 Not compatible 👼

Context

# Packages matching: installed
# Name              # Installed # Synopsis
base-bigarray       base
base-threads        base
base-unix           base
conf-findutils      1           Virtual package relying on findutils
coq                 8.12.2      Formal proof management system
num                 1.4         The legacy Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.08.1      The OCaml compiler (virtual package)
ocaml-base-compiler 4.08.1      Official release 4.08.1
ocaml-config        1           OCaml Switch Configuration
ocamlfind           1.9.5       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "matej.kosik@inria.fr"
homepage: "https://github.com/coq-contribs/otway-rees"
license: "Proprietary"
build: [make "-j%{jobs}%"]
install: [make "install"]
remove: ["rm" "-R" "%{lib}%/coq/user-contrib/OtwayRees"]
depends: [
  "ocaml"
  "coq" {>= "8.5" & < "8.6~"}
]
tags: [ "keyword:otway rees" "keyword:protocols" "keyword:cryptography" "category:Computer Science/Concurrent Systems and Protocols/Correctness of specific protocols" ]
authors: [ "Dominique Bolignano <>" "Valérie Ménissier-Morain <>" ]
bug-reports: "https://github.com/coq-contribs/otway-rees/issues"
dev-repo: "git+https://github.com/coq-contribs/otway-rees.git"
synopsis: "Otway-Rees cryptographic protocol"
description: """
A description and a proof of correctness for
the Otway-Rees cryptographic protocol, usually used as an example for
formalisation of such protocols."""
flags: light-uninstall
url {
  src: "https://github.com/coq-contribs/otway-rees/archive/v8.5.0.tar.gz"
  checksum: "md5=f7837476dd70663f035427486317a9f5"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-otway-rees.8.5.0 coq.8.12.2

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.12.2).
The following dependencies couldn't be met:
  - coq-otway-rees -> coq < 8.6~ -> ocaml < 4.06.0
      base of this switch (use `--unlock-base' to force)
No solution found, exiting

Dry install without Coq/switch base, to test if the problem was incompatibility with the current Coq/OCaml version:

Command: opam remove -y coq; opam install -y --show-action --unlock-base coq-otway-rees.8.5.0
Return code: 0

Install dependencies

Command: true
Return code: 0
Duration: 0 s

Install 🚀

Command: true
Return code: 0
Duration: 0 s

Installation size

No files were installed.

Uninstall 🧹

Command: true
Return code: 0
Missing removes: none
Wrong removes: none