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iris-heap-lang 4.0.0 Not compatible 👼

Context

# Packages matching: installed
# Name              # Installed # Synopsis
base-bigarray       base
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                 8.7.1       Formal proof management system
num                 1.4         The legacy Num library for arbitrary-precision integer and rational arithmetic
ocaml               4.07.1      The OCaml compiler (virtual package)
ocaml-base-compiler 4.07.1      Official release 4.07.1
ocaml-config        1           OCaml Switch Configuration
ocamlfind           1.9.5       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "Ralf Jung <jung@mpi-sws.org>"
authors: "The Iris Team"
license: "BSD-3-Clause"
homepage: "https://iris-project.org/"
bug-reports: "https://gitlab.mpi-sws.org/iris/iris/issues"
dev-repo: "git+https://gitlab.mpi-sws.org/iris/iris.git"
synopsis: "The canonical example language for Iris"
description: """
This package defines HeapLang, a concurrent lambda calculus with references, and
uses Iris to build a program logic for HeapLang programs.
"""
tags: [
  "date:2022-08-17"
  "logpath:iris.heap_lang"
]
depends: [
  "coq-iris" {= version}
]
build: ["./make-package" "iris_heap_lang" "-j%{jobs}%"]
install: ["./make-package" "iris_heap_lang" "install"]
url {
  src:
    "https://gitlab.mpi-sws.org/iris/iris/-/archive/iris-4.0.0.tar.gz"
  checksum:
    "sha512=919ab6a7657d7bc6df3be576a752df884e44b638318574fcf0682cc04be3a272270986fb23a0010b09b4fd80c6a0dafe04b7364764381e6831e81e1f942ebffc"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-iris-heap-lang.4.0.0 coq.8.7.1

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.7.1).
The following dependencies couldn't be met:
  - coq-iris-heap-lang -> coq-iris >= 4.0.0 -> coq >= dev -> ocaml >= 4.09.0
      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-iris-heap-lang.4.0.0
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