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izf 8.6.0 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                 8.10.0      Formal proof management system
num                 1.4         The legacy Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.09.1      The OCaml compiler (virtual package)
ocaml-base-compiler 4.09.1      Official release 4.09.1
ocaml-config        1           OCaml Switch Configuration
ocamlfind           1.9.1       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "Hugo.Herbelin@inria.fr"
homepage: "https://github.com/coq-contribs/izf"
license: "LGPL 2.1"
build: [make "-j%{jobs}%"]
install: [make "install"]
depends: [
  "ocaml"
  "coq" {>= "8.6" & < "8.7~"}
]
tags: [ "keyword: Intuitionistic set theory" "keyword: pointed graphs" "keyword: type theory" "keyword: intuitionistic choice operator" "keyword: set theory" "keyword: Zermelo-Fraenkel" "category: Mathematics/Logic/Set theory" "date: 2003-02" ]
authors: [ "Alexandre Miquel <Alexandre.Miquel@pps.jussieu.fr> [http://www.pps.jussieu.fr/~miquel]" ]
bug-reports: "https://github.com/coq-contribs/izf/issues"
dev-repo: "git+https://github.com/coq-contribs/izf.git"
synopsis: "Intuitionistic Zermelo-Fraenkel Set Theory in Coq"
description: """
This development contains the set-as-pointed-graph
interpretation of Intuitionistic Zermelo Frankel set theory in system
F_omega.2++ (F_omega + one extra universe + intuitionistic choice
operator), which is described in chapter 9 of the author's PhD
thesis (for IZ) and in the author's CSL'03 paper (for the extension
IZ -> IZF)."""
url {
  src: "https://github.com/coq-contribs/izf/archive/v8.6.0.tar.gz"
  checksum: "md5=8d053efae698a9ebf32f332a527ef5f7"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-izf.8.6.0 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-izf -> coq < 8.7~ -> 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-izf.8.6.0
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