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regexp 8.7.0 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                 8.12.2      Formal proof management system
num                 1.4         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           1.9.5       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "Hugo.Herbelin@inria.fr"
homepage: "https://github.com/coq-contribs/regexp"
license: "LGPL"
build: [make "-j%{jobs}%"]
install: [make "install"]
remove: ["rm" "-R" "%{lib}%/coq/user-contrib/RegExp"]
depends: [
  "ocaml"
  "coq" {>= "8.7" & < "8.8~"}
]
tags: [
  "keyword: regular expressions"
  "keyword: Kleene algebra"
  "category: Computer Science/Formal Languages Theory and Automata"
]
authors: [ "Takashi Miyamoto <tmiya@bu.iij4u.or.jp> [http://study-func-prog.blogspot.com/]" ]
bug-reports: "https://github.com/coq-contribs/regexp/issues"
dev-repo: "git+https://github.com/coq-contribs/regexp.git"
synopsis: "Regular Expression"
description: """
The Library RegExp is a Coq library for regular expression. The implementation is based on the Janusz Brzozowski's algorithm ("Derivatives of Regular Expressions", Journal of the ACM 1964).
The RegExp library satisfies the axioms of Kleene Algebra. The proofs are shown in the library."""
flags: light-uninstall
url {
  src: "https://github.com/coq-contribs/regexp/archive/v8.7.0.tar.gz"
  checksum: "md5=ea5fb8370ee2f55d922cdff26faea9c3"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-regexp.8.7.0 coq.8.12.2

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.12.2).
The following dependencies couldn't be met:
  - coq-regexp -> coq < 8.8~ -> 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-regexp.8.7.0
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