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hammer 1.0.3 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
camlp4              4.03+1       Camlp4 is a system for writing extensible parsers for programming languages
conf-findutils      1            Virtual package relying on findutils
conf-which          1            Virtual package relying on which
coq                 8.5.2~camlp4 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
ocamlbuild          0.14.2       OCamlbuild is a build system with builtin rules to easily build most OCaml projects
# opam file:
opam-version: "2.0"
maintainer: "Julien Narboux <julien@narboux.fr>"
homepage: "http://cl-informatik.uibk.ac.at/cek/coqhammer/"
bug-reports: "mailto://lukaszcz@mimuw.edu.pl"
authors: ["Ł. Czajka"
 	  "Cezary Kaliszyk"]
license: "LGPL 2.1"
build: [
  ["sed" "-i" "s|usr\\/local|%{prefix}%|g" "_CoqProject"]
  ["coq_makefile" "-f" "_CoqProject" "-o" "Makefile"]
  [make]
]
install: [
  [make "install"]
]
remove: [
	["rm" "-R" "%{lib}%/coq/user-contrib/Hammer"]
	["rm" "%{prefix}%/bin/predict"]
]
depends: [
  "ocaml"
  "conf-g++" {build}
  "coq" {(>= "8.6" & < "8.7~")}
]
tags: [ "keyword:automation"
	"category:Miscellaneous/Coq Extensions"
	"date:2017-09-30"  ]
synopsis: "Automation for Dependent Type Theory"
flags: light-uninstall
url {
  src:
    "http://cl-informatik.uibk.ac.at/cek/coqhammer/coqhammer-1.0.3-coq8.6.tar.gz"
  checksum: "md5=4d0fb044c9ddecac60b6aea7310a2379"
}

Lint

Command: true
Return code: 0

Dry install 🏜️

Dry install with the current Coq version:

Command

opam install -y --show-action coq-hammer.1.0.3 coq.8.5.2~camlp4

Return code

5120

Output

[NOTE] Package coq is already installed (current version is 8.5.2~camlp4).
The following dependencies couldn't be met:
  - coq-hammer -> coq >= 8.6 -> ocaml >= 4.05.0
      base of this switch (use `--unlock-base' to force)
  - coq-hammer -> coq >= 8.6 -> coq-core -> 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-hammer.1.0.3
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