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math-classes 1.0.4 Not compatible 👼

Context

# Packages matching: installed
# Name              # Installed  # Synopsis
base-bigarray       base
base-num            base         Num library distributed with the OCaml compiler
base-ocamlbuild     base         OCamlbuild binary and libraries distributed with the OCaml compiler
base-threads        base
base-unix           base
camlp4              4.02+7       Camlp4 is a system for writing extensible parsers for programming languages
conf-findutils      1            Virtual package relying on findutils
conf-which          1            Virtual package relying on which
coq                 8.4.6~camlp4 Formal proof management system.
num                 0            The Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.02.3       The OCaml compiler (virtual package)
ocaml-base-compiler 4.02.3       Official 4.02.3 release
ocaml-config        1            OCaml Switch Configuration
ocamlbuild          0            Build system distributed with the OCaml compiler since OCaml 3.10.0
# opam file:
opam-version: "2.0"
maintainer: "b.a.w.spitters@gmail.com"
homepage: "https://github.com/math-classes/"
doc: "https://github.com/math-classes/"
authors: [
  "Eelis van der Weegen"
  "Bas Spitters"
  "Robbert Krebbers"
]
license: "Public Domain"
build: [
  [ "./configure.sh" ]
  [ make "-j%{jobs}%" ]
]
install: [ make "install" ]
depends: [
  "ocaml"
  "coq" {>= "8.5" & < "8.6~"}
]
tags: [
  "logpath:MathClasses"
]
synopsis: "A library of abstract interfaces for mathematical structures in Coq"
url {
  src:
    "https://github.com/math-classes/math-classes/archive/9853988446ab19ee0618181f8da1d7dbdebcc45f.zip"
  checksum: "md5=b2293d8e429ab1174160f68c1cba12d2"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-math-classes.1.0.4 coq.8.4.6~camlp4

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.4.6~camlp4).
The following dependencies couldn't be met:
  - coq-math-classes -> coq >= 8.5 -> ocaml >= 4.05.0
      base of this switch (use `--unlock-base' to force)
  - coq-math-classes -> coq >= 8.5 -> coq-core -> ocaml >= 4.09.0
      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.1.0.4
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