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hydra-battles 0.4 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                 8.10.0      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           1.9.3       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "palmskog@gmail.com"
homepage: "https://github.com/coq-community/hydra-battles"
dev-repo: "git+https://github.com/coq-community/hydra-battles.git"
bug-reports: "https://github.com/coq-community/hydra-battles/issues"
license: "MIT"
synopsis: "Exploration of some properties of Kirby and Paris' hydra battles, with the help of Coq"
description: """
An exploration of some properties of Kirby and Paris' hydra battles,
with the help of the Coq Proof assistant. This development includes
the study of several representations of ordinal numbers, and a part
of the so-called Ketonen and Solovay machinery (combinatorial
properties of epsilon0)."""
build: ["dune" "build" "-p" name "-j" jobs]
depends: [
  "dune" {>= "2.5"}
  "coq" {(>= "8.11" & < "8.14~") | (= "dev")}
  "coq-equations" {(>= "1.2" & < "1.3~") | (= "dev")}
]
tags: [
  "category:Mathematics/Combinatorics and Graph Theory"
  "category:Mathematics/Logic/Foundations"
  "keyword:Ketonen-Solovay machinery"
  "keyword:ordinals"
  "keyword:primitive recursive functions"
  "logpath:hydras"
  "date:2021-05-19"
]
authors: [
  "Pierre Castéran"
]
url {
  src: "https://github.com/coq-community/hydra-battles/archive/v0.4.tar.gz"
  checksum: "sha256=bba82794e49e03fd82fcee592b2b037ec20669d10e6c47ed8b4f8a7f851756eb"
}

Lint

Command
true
Return code
0

Dry install 🏜️

Dry install with the current Coq version:

Command
opam install -y --show-action coq-hydra-battles.0.4 coq.8.10.0
Return code
5120
Output
[NOTE] Package coq is already installed (current version is 8.10.0).
The following dependencies couldn't be met:
  - coq-hydra-battles -> coq >= dev
      no matching version
Your request can't be satisfied:
  - No available version of coq satisfies the constraints
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-hydra-battles.0.4
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