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three-gap 8.10.0 Not compatible 👼

Context

# Packages matching: installed
# Name              # Installed # Synopsis
base-bigarray       base
base-num            base        Num library distributed with the OCaml compiler
base-threads        base
base-unix           base
camlp5              7.14        Preprocessor-pretty-printer of OCaml
conf-findutils      1           Virtual package relying on findutils
conf-perl           2           Virtual package relying on perl
coq                 8.6.1       Formal proof management system
num                 0           The Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.03.0      The OCaml compiler (virtual package)
ocaml-base-compiler 4.03.0      Official 4.03.0 release
ocaml-config        1           OCaml Switch Configuration
ocamlfind           1.9.6       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "Hugo.Herbelin@inria.fr"
homepage: "https://github.com/coq-contribs/three-gap"
license: "LGPL 2.1"
build: [make "-j%{jobs}%"]
install: [make "install"]
remove: ["rm" "-R" "%{lib}%/coq/user-contrib/ThreeGap"]
depends: [
  "ocaml"
  "coq" {>= "8.10" & < "8.11~"}
]
tags: [
  "keyword: real numbers"
  "keyword: Steinhaus"
  "keyword: Three Gap Theorem"
  "category: Mathematics/Geometry"
  "category: Mathematics/Arithmetic and Number Theory/Miscellaneous"
]
authors: [
  "Micaela Mayero"
]
bug-reports: "https://github.com/coq-contribs/three-gap/issues"
dev-repo: "git+https://github.com/coq-contribs/three-gap.git"
synopsis: "A Proof of the Three Gap Theorem (Steinhaus Conjecture)"
description: """
This proof uses the real numbers. It is a classical proof."""
flags: light-uninstall
url {
  src: "https://github.com/coq-contribs/three-gap/archive/v8.10.0.tar.gz"
  checksum: "md5=2eb0a43d67d0aa5604f48ccfb9e520a0"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-three-gap.8.10.0 coq.8.6.1

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.6.1).
The following dependencies couldn't be met:
  - coq-three-gap -> coq >= 8.10 -> ocaml >= 4.05.0
      base of this switch (use `--unlock-base' to force)
  - coq-three-gap -> coq >= 8.10 -> coq-core -> ocaml >= 4.09.0
      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-three-gap.8.10.0
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