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sum-of-two-square 8.5.0 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               4.06.1      The OCaml compiler (virtual package)
ocaml-base-compiler 4.06.1      Official 4.06.1 release
ocaml-config        1           OCaml Switch Configuration
ocamlfind           1.9.5       A library manager for OCaml
# opam file:
opam-version: "2.0"
maintainer: "matej.kosik@inria.fr"
homepage: "https://github.com/coq-contribs/sum-of-two-square"
license: "LGPL 2"
build: [make "-j%{jobs}%"]
install: [make "install"]
remove: ["rm" "-R" "%{lib}%/coq/user-contrib/SumOfTwoSquare"]
depends: [
  "ocaml"
  "coq" {>= "8.5" & < "8.6~"}
]
tags: [ "keyword:number theory" "category:Mathematics/Arithmetic and Number Theory/Number theory" "date:2004-12-13" ]
authors: [ "Laurent Théry <>" ]
bug-reports: "https://github.com/coq-contribs/sum-of-two-square/issues"
dev-repo: "git+https://github.com/coq-contribs/sum-of-two-square.git"
synopsis: "Numbers equal to the sum of two square numbers"
description: """
A proof that a number n can be written as the
sum of two square numbers if and only if each prime factor p of n
that is equal to 3 modulo 4 has its exponent in the decomposition of n
that is even."""
flags: light-uninstall
url {
  src:
    "https://github.com/coq-contribs/sum-of-two-square/archive/v8.5.0.tar.gz"
  checksum: "md5=ed5edb5f3c6fb48ed7ff352767db6264"
}

Lint

Command
true
Return code
0

Dry install 🏜️

Dry install with the current Coq version:

Command
opam install -y --show-action coq-sum-of-two-square.8.5.0 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-sum-of-two-square -> coq < 8.6~ -> ocaml < 4.06.0
      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-sum-of-two-square.8.5.0
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