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hammer-tactics 1.2.1+8.10 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                 8.12.0      Formal proof management system
num                 1.4         The legacy Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.09.1      The OCaml compiler (virtual package)
ocaml-base-compiler 4.09.1      Official release 4.09.1
ocaml-config        1           OCaml Switch Configuration
ocamlfind           1.9.3       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "palmskog@gmail.com"
homepage: "https://github.com/lukaszcz/coqhammer"
dev-repo: "git+https://github.com/lukaszcz/coqhammer.git"
bug-reports: "https://github.com/lukaszcz/coqhammer/issues"
license: "LGPL-2.1-only"
synopsis: "Reconstruction tactics for the hammer for Coq"
description: """
Collection of tactics that are used by the hammer for Coq
to reconstruct proofs found by automated theorem provers. When the hammer
has been successfully applied to a project, only this package needs
to be installed; the hammer plugin is not required.
"""
build: [make "-j%{jobs}%" {ocaml:version >= "4.06"} "tactics"]
install: [
  [make "install-tactics"]
  [make "test-tactics"] {with-test}
]
depends: [
  "ocaml"
  "coq" {>= "8.10" & < "8.11~"}
]
conflicts: [
  "coq-hammer" {!= version}
]
tags: [
  "keyword:automation"
  "keyword:hammer"
  "keyword:tactics"
  "logpath:Hammer.Tactics"
  "date:2020-06-05"
]
authors: [
  "Lukasz Czajka <lukaszcz@mimuw.edu.pl>"
]
url {
  src: "https://github.com/lukaszcz/coqhammer/archive/refs/tags/v1.2.1-coq8.10.tar.gz"
  checksum: "sha512=22081122b39ee1099e79ef82f1afc1895350475fd255cdc51d3a47851184decd0bff7975b9effcd39ca9b55bb381e06cf649ad2d460dd31eec537eca44f2a6e1"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-hammer-tactics.1.2.1+8.10 coq.8.12.0

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.12.0).
The following dependencies couldn't be met:
  - coq-hammer-tactics -> coq < 8.11~ -> 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-hammer-tactics.1.2.1+8.10
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