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metacoq-erasure 1.0~beta2+8.12 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                 8.12.1      Formal proof management system
num                 1.4         The legacy Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.11.2      The OCaml compiler (virtual package)
ocaml-base-compiler 4.11.2      Official release 4.11.2
ocaml-config        1           OCaml Switch Configuration
ocamlfind           1.9.5       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "matthieu.sozeau@inria.fr"
homepage: "https://metacoq.github.io/metacoq"
dev-repo: "git+https://github.com/MetaCoq/metacoq.git#coq-8.11"
bug-reports: "https://github.com/MetaCoq/metacoq/issues"
authors: ["Abhishek Anand <aa755@cs.cornell.edu>"
          "Simon Boulier <simon.boulier@inria.fr>"
          "Cyril Cohen <cyril.cohen@inria.fr>"
          "Yannick Forster <forster@ps.uni-saarland.de>"
          "Fabian Kunze <fkunze@fakusb.de>"
          "Gregory Malecha <gmalecha@gmail.com>"
          "Matthieu Sozeau <matthieu.sozeau@inria.fr>"
          "Nicolas Tabareau <nicolas.tabareau@inria.fr>"
          "Théo Winterhalter <theo.winterhalter@inria.fr>"
]
license: "MIT"
build: [
  ["sh" "./configure.sh"]
  [make "-j" "%{jobs}%" "-C" "erasure"]
]
install: [
  [make "-C" "erasure" "install"]
]
depends: [
  "ocaml" {>= "4.07.1" & < "4.12~"}
  "coq" { >= "8.12~" & < "8.13~" }
  "coq-metacoq-template" {= version}
  "coq-metacoq-pcuic" {= version}
  "coq-metacoq-safechecker" {= version}
]
synopsis: "Implementation and verification of an erasure procedure for Coq"
description: """
MetaCoq is a meta-programming framework for Coq.
The Erasure module provides a complete specification of Coq's so-called
\"extraction\" procedure, starting from the PCUIC calculus and targeting
untyped call-by-value lambda-calculus.
The `erasure` function translates types and proofs in well-typed terms
into a dummy `tBox` constructor, following closely P. Letouzey's PhD
thesis.
"""
url {
  src: "https://github.com/MetaCoq/metacoq/archive/v1.0-beta2-8.12.tar.gz"
  checksum: "sha256=108582a6f11ed511a5a94f2b302359f8d648168cba893169009def7c19e08778"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-metacoq-erasure.1.0~beta2+8.12 coq.8.12.1

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.12.1).
The following dependencies couldn't be met:
  - coq-metacoq-erasure -> coq-metacoq-safechecker = 1.0~beta2+8.12 -> ocaml < 4.10~
      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-metacoq-erasure.1.0~beta2+8.12
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