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mtac2 1.4+8.18 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                 8.8.1       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: "beta.ziliani@gmail.com"
homepage: "https://github.com/Mtac2/Mtac2"
dev-repo: "git+https://github.com/Mtac2/Mtac2.git"
bug-reports: "https://github.com/Mtac2/Mtac2/issues"
authors: [
 "Beta Ziliani <beta.ziliani@gmail.com>"
 "Jan-Oliver Kaiser <janno@mpi-sws.org"
 "Robbert Krebbers <mail@robbertkrebbers.nl>"
 "Yann Régis-Gianas <yrg@pps.univ-paris-diderot.fr>"
]
license: "MIT"
synopsis: "Typed tactic language for Coq"
build: [
  ["./configure.sh"]
  [make "-j%{jobs}%"]
]
install: [
  [make "install"]
]
depends: [
  "coq" {>= "8.18" & < "8.19"}
  "coq-unicoq" {>= "1.5" & < "2~"}
]
url {
  src: "https://github.com/Mtac2/Mtac2/archive/refs/tags/v1.4-coq8.18.tar.gz"
  checksum: [
    "sha512=50a12d086da0416774b4464a234df7ce86c191c45345b2951b6c6ecdbe7675e215e2507b8af45daafd3ea09c35862ad8c1adee61ae34995148c73eb85749d68a"
  ]
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-mtac2.1.4+8.18 coq.8.8.1

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.8.1).
The following dependencies couldn't be met:
  - coq-mtac2 -> coq >= 8.18 -> coq-core >= 8.18.0 -> 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-mtac2.1.4+8.18
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