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relation-algebra 1.7.1 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-m4             1           Virtual package relying on m4
coq                 8.10.0      Formal proof management system
num                 1.3         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           1.8.1       A library manager for OCaml
# opam file:
opam-version: "2.0"
name: "coq-relation-algebra"
synopsis: "Relation Algebra and KAT in Coq"
maintainer: "Damien Pous <Damien.Pous@ens-lyon.fr>"
homepage: "http://perso.ens-lyon.fr/damien.pous/ra/"
license: "LGPL"
depends: [
  "ocaml"
  "coq" {>= "8.9" & < "8.10~"}
]
depopts: [ "coq-mathcomp-ssreflect" ]
build: [
  ["sh" "-exc" "./configure --%{coq-mathcomp-ssreflect:enable}%-ssr"]
  [make "-j%{jobs}%"]
]
install: [make "install"]
remove: [ "sh" "-exc" "rm -r '%{lib}%/coq/user-contrib/RelationAlgebra'" ]
tags: [
  "keyword:relation algebra"
  "keyword:kleene algebra with tests"
  "keyword:kat"
  "keyword:allegories"
  "keyword:residuated structures"
  "keyword:automata"
  "keyword:regular expressions"
  "keyword:matrices"
  "category:Mathematics/Algebra"
  "logpath:RelationAlgebra" ]
authors: [
  "Damien Pous <Damien.Pous@ens-lyon.fr>"
  "Christian Doczkal <christian.doczkal@ens-lyon.fr>"
]
url {
  src:
    "https://github.com/damien-pous/relation-algebra/archive/v1.7.1.tar.gz"
  checksum: "md5=1a37b6b785540d56133bf637c858c094"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-relation-algebra.1.7.1 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-relation-algebra -> coq < 8.10~ -> 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-relation-algebra.1.7.1
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