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ltac2 dev Error 🔥

Context

# Packages matching: installed
# Name                   # Installed # Synopsis
base-bigarray            base
base-threads             base
base-unix                base
conf-findutils           1           Virtual package relying on findutils
conf-gmp                 3           Virtual package relying on a GMP lib system installation
coq                      dev         Formal proof management system
dune                     2.9.1       Fast, portable, and opinionated build system
ocaml                    4.05.0      The OCaml compiler (virtual package)
ocaml-base-compiler      4.05.0      Official 4.05.0 release
ocaml-config             1           OCaml Switch Configuration
ocaml-secondary-compiler 4.08.1-1    OCaml 4.08.1 Secondary Switch Compiler
ocamlfind                1.9.1       A library manager for OCaml
ocamlfind-secondary      1.9.1       Adds support for ocaml-secondary-compiler to ocamlfind
zarith                   1.12        Implements arithmetic and logical operations over arbitrary-precision integers
# opam file:
opam-version: "2.0"
name: "coq-ltac2"
maintainer: "Pierre-Marie Pédrot <pierre-marie.pedrot@irif.fr>"
license: "LGPL 2.1"
homepage: "https://github.com/ppedrot/ltac2"
dev-repo: "git+https://github.com/ppedrot/ltac2.git"
bug-reports: "https://github.com/ppedrot/ltac2/issues"
build: [
  [make "COQBIN=\"\"" "-j%{jobs}%"]
]
install: [make "install"]
remove: [make "uninstall"]
depends: [
  "ocaml"
  "coq" {= "dev"}
]
synopsis: "A tactic language for Coq."
authors: "Pierre-Marie Pédrot <pierre-marie.pedrot@irif.fr>"
url {
  src: "git+https://github.com/ppedrot/ltac2.git#master"
}

Lint

Command
true
Return code
0

Dry install 🏜️

Dry install with the current Coq version:

Command
opam install -y --show-action coq-ltac2.dev coq.dev
Return code
0

Dry install without Coq/switch base, to test if the problem was incompatibility with the current Coq/OCaml version:

Command
true
Return code
0

Install dependencies

Command
opam list; echo; ulimit -Sv 4000000; timeout 4h opam install -y --deps-only coq-ltac2.dev coq.dev
Return code
0
Duration
1 m 0 s

Install 🚀

Command
opam list; echo; ulimit -Sv 16000000; timeout 4h opam install -y coq-ltac2.dev coq.dev
Return code
7936
Duration
1 m 0 s
Output
# Packages matching: installed
# Name                   # Installed # Synopsis
base-bigarray            base
base-threads             base
base-unix                base
conf-findutils           1           Virtual package relying on findutils
conf-gmp                 3           Virtual package relying on a GMP lib system installation
coq                      dev         Formal proof management system
dune                     2.9.1       Fast, portable, and opinionated build system
ocaml                    4.05.0      The OCaml compiler (virtual package)
ocaml-base-compiler      4.05.0      Official 4.05.0 release
ocaml-config             1           OCaml Switch Configuration
ocaml-secondary-compiler 4.08.1-1    OCaml 4.08.1 Secondary Switch Compiler
ocamlfind                1.9.1       A library manager for OCaml
ocamlfind-secondary      1.9.1       Adds support for ocaml-secondary-compiler to ocamlfind
zarith                   1.12        Implements arithmetic and logical operations over arbitrary-precision integers
[NOTE] Package coq is already installed (current version is dev).
The following actions will be performed:
  - install coq-ltac2 dev
<><> Gathering sources ><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[coq-ltac2.dev] synchronised from git+https://github.com/ppedrot/ltac2.git#master
<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
[ERROR] The compilation of coq-ltac2 failed at "/home/bench/.opam/opam-init/hooks/sandbox.sh build make COQBIN=\"\" -j7".
#=== ERROR while compiling coq-ltac2.dev ======================================#
# context              2.0.1 | linux/x86_64 | ocaml-base-compiler.4.05.0 | file:///home/bench/run/opam-coq-archive/extra-dev
# path                 ~/.opam/ocaml-base-compiler.4.05.0/.opam-switch/build/coq-ltac2.dev
# command              ~/.opam/opam-init/hooks/sandbox.sh build make COQBIN="" -j7
# exit-code            2
# env-file             ~/.opam/log/coq-ltac2-7876-6cc03f.env
# output-file          ~/.opam/log/coq-ltac2-7876-6cc03f.out
### output ###
# make: *** No targets specified and no makefile found.  Stop.
<><> Error report <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
+- The following actions failed
| - build coq-ltac2 dev
+- 
- No changes have been performed
# Run eval $(opam env) to update the current shell environment

Installation size

No files were installed.

Uninstall 🧹

Command
true
Return code
0
Missing removes
none
Wrong removes
none