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math-classes 8.12.0 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
conf-gmp                 4           Virtual package relying on a GMP lib system installation
coq                      8.15.2      Formal proof management system
dune                     3.6.1       Fast, portable, and opinionated build system
ocaml                    4.06.1      The OCaml compiler (virtual package)
ocaml-base-compiler      4.06.1      Official 4.06.1 release
ocaml-config             1           OCaml Switch Configuration
ocaml-secondary-compiler 4.08.1-1    OCaml 4.08.1 Secondary Switch Compiler
ocamlfind                1.9.1       A library manager for OCaml
ocamlfind-secondary      1.9.1       Adds support for ocaml-secondary-compiler to ocamlfind
zarith                   1.12        Implements arithmetic and logical operations over arbitrary-precision integers
# opam file:
opam-version: "2.0"
maintainer: "b.a.w.spitters@gmail.com"
homepage: "https://github.com/coq-community/math-classes"
dev-repo: "git+https://github.com/coq-community/math-classes.git"
bug-reports: "https://github.com/coq-community/math-classes/issues"
license: "MIT"
synopsis: "A library of abstract interfaces for mathematical structures in Coq"
description: """
Math classes is a library of abstract interfaces for mathematical
structures, such as:
*  Algebraic hierarchy (groups, rings, fields, …)
*  Relations, orders, …
*  Categories, functors, universal algebra, …
*  Numbers: N, Z, Q, …
*  Operations, (shift, power, abs, …)
It is heavily based on Coq’s new type classes in order to provide:
structure inference, multiple inheritance/sharing, convenient
algebraic manipulation (e.g. rewriting) and idiomatic use of
notations.
"""
build: [
  [ "./configure.sh" ]
  [ make "-j%{jobs}%" ]
]
install: [make "install"]
depends: [
  "coq" {>= "8.6" & < "8.13~"}
  "coq-bignums" 
]
tags: [
  "logpath:MathClasses"
  "date:2020-09-02"
]
authors: [
  "Eelis van der Weegen"
  "Bas Spitters"
  "Robbert Krebbers"
]
url {
  src: "https://github.com/coq-community/math-classes/archive/8.12.0.tar.gz"
  checksum: "sha512=78f07fb5e48260ddbf579b0a470b97dcd1974200fce7e50161d259891fca86e9f896778805a7100ba8e35574b1438ad5822c197d7e30a0449d34a4e213885c2b"
}

Lint

Command
true
Return code
0

Dry install 🏜️

Dry install with the current Coq version:

Command
opam install -y --show-action coq-math-classes.8.12.0 coq.8.15.2
Return code
5120
Output
[NOTE] Package coq is already installed (current version is 8.15.2).
The following dependencies couldn't be met:
  - coq-math-classes -> coq < 8.13~ -> ocaml < 4.06.0
      base of this switch (use `--unlock-base' to force)
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-math-classes.8.12.0
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