memcad 1.0.0

Error log

The package failed to build. The error log from opam follows.

Opam plugin "depext" may require upgrading/reinstalling. Reinstall the plugin on the current switch? [Y/n] y
The following actions will be performed:
  - recompile opam-depext 1.2.3

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved opam-depext.1.2.3  (cached)
-> removed   opam-depext.1.2.3
-> installed opam-depext.1.2.3
Done.

<><> opam-depext.1.2.3 installed successfully <><><><><><><><><><><><><><><><><>
=> opam-depext is unnecessary when used with opam >= 2.1. Please use opam install directly instead
# Run eval $(opam env) to update the current shell environment

<><> Carrying on to "opam depext -viy memcad.1.0.0 stdlib-shims.0.3.0 setr.0.1.1 seq.0.3.1 qtest.2.11.2 qcheck-ounit.0.17 qcheck-core.0.17 qcheck.0.17 parmap.1.2.5 ounit2.2.2.7 ounit.2.2.7 ocamlmod.0.0.9 ocamlify.0.0.1 ocamlfind.1.9.6 ocamlbuild.0.14.3 obuild.0.1.11 oasis.0.4.11 num.0 mlgmpidl.1.3.0 mlbdd.0.7.3 host-arch-x86_64.1 ez-conf-lib.2 dune-configurator.3.16.0 dune.3.16.0 dolog.3.0 deriving.0.8.1 csexp.1.5.2 cppo.1.7.0 conf-which.1 conf-wget.1 conf-pkg-config.3 conf-perl.2 conf-ncurses.1 conf-mpfr-paths.1 conf-graphviz.0.1 conf-gmp-paths.1 conf-findutils.1 conf-binutils.0.2 clangml-transforms.0.23 clangml.3.9.1.2 camlp4.4.04+1 camlp-streams.5.0.1 camlidl.1.09 bigarray-compat.1.1.0 bdd.0.3 batteries.3.7.1 base-num.base base-bytes.base apron.v0.9.15 ANSITerminal.0.8.5" 

Since version 2.1, opam now handles external dependencies alongside OCaml ones, and the `depext` plugin interface is provided for backwards compatibility only. Consider using your usual `opam install` command to install both OCaml and system dependencies, or `opam install <pkg> --depext-only` if you want to only install external dependencies.
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
[ERROR] No solution for memcad.1.0.0 & stdlib-shims.0.3.0 & setr.0.1.1 & seq.0.3.1 & qtest.2.11.2 & qcheck-ounit.0.17 & qcheck-core.0.17 & qcheck.0.17 & parmap.1.2.5 & ounit2.2.2.7 & ounit.2.2.7 & ocamlmod.0.0.9 & ocamlify.0.0.1 & ocamlfind.1.9.6 & ocamlbuild.0.14.3 & obuild.0.1.11 & oasis.0.4.11 & num.0 & mlgmpidl.1.3.0 & mlbdd.0.7.3 & host-arch-x86_64.1 & ez-conf-lib.2 & dune-configurator.3.16.0 & dune.3.16.0 & dolog.3.0 & deriving.0.8.1 & csexp.1.5.2 & cppo.1.7.0 & conf-which.1 & conf-wget.1 & conf-pkg-config.3 & conf-perl.2 & conf-ncurses.1 & conf-mpfr-paths.1 & conf-graphviz.0.1 & conf-gmp-paths.1 & conf-findutils.1 & conf-binutils.0.2 & clangml-transforms.0.23 & clangml.3.9.1.2 & camlp4.4.04+1 & camlp-streams.5.0.1 & camlidl.1.09 & bigarray-compat.1.1.0 & bdd.0.3 & batteries.3.7.1 & base-num.base & base-bytes.base & apron.v0.9.15 & ANSITerminal.0.8.5:   * Missing dependency:
            - clangml > 4.8.0
            no matching version


Command failed: opam --cli=2.1 list --readonly --external '--resolve=memcad.1.0.0,stdlib-shims.0.3.0,setr.0.1.1,seq.0.3.1,qtest.2.11.2,qcheck-ounit.0.17,qcheck-core.0.17,qcheck.0.17,parmap.1.2.5,ounit2.2.2.7,ounit.2.2.7,ocamlmod.0.0.9,ocamlify.0.0.1,ocamlfind.1.9.6,ocamlbuild.0.14.3,obuild.0.1.11,oasis.0.4.11,num.0,mlgmpidl.1.3.0,mlbdd.0.7.3,host-arch-x86_64.1,ez-conf-lib.2,dune-configurator.3.16.0,dune.3.16.0,dolog.3.0,deriving.0.8.1,csexp.1.5.2,cppo.1.7.0,conf-which.1,conf-wget.1,conf-pkg-config.3,conf-perl.2,conf-ncurses.1,conf-mpfr-paths.1,conf-graphviz.0.1,conf-gmp-paths.1,conf-findutils.1,conf-binutils.0.2,clangml-transforms.0.23,clangml.3.9.1.2,camlp4.4.04+1,camlp-streams.5.0.1,camlidl.1.09,bigarray-compat.1.1.0,bdd.0.3,batteries.3.7.1,base-num.base,base-bytes.base,apron.v0.9.15,ANSITerminal.0.8.5' --color=never returned 20