rpclib-lwt 9.0.0

Error log

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

You are using opam 2.1+, where external dependency handling has been integrated: consider calling opam directly, the 'depext' plugin interface is provided for backwards compatibility only
# Detecting depexts using vars: arch=x86_64, os=linux, os-distribution=debian, os-family=debian
[ERROR] No solution for vhdlib.0.9.1 & base-bytes.base & base64.3.5.0 & cmdliner.1.1.1 & cppo.1.6.9 & csexp.1.5.1 & dune.3.4.1 & dune-configurator.3.4.1 & lwt.5.6.1 & ocaml-compiler-libs.v0.12.4 & ocamlbuild.0.14.1 & ocamlfind.1.9.5 & ocplib-endian.1.2 & ppx_derivers.1.2.1 & ppx_deriving_rpc.9.0.0 & ppxlib.0.27.0 & result.1.5 & rpc.9.0.0 & rpclib.9.0.0 & rpclib-lwt.9.0.0 & rresult.0.7.0 & seq.base & sexplib0.v0.15.1 & stdlib-shims.0.3.0 & topkg.1.0.5 & xmlm.1.4.0 & yojson.2.0.2:   * Missing dependency:
            - vhdlib
            depends on the unavailable system package 'blktap-dev'. Use `--no-depexts' to attempt installation anyway, or it is possible that a depext package name in the opam file is incorrect.


Command failed: opam --cli=2.1 list --readonly --external '--resolve=vhdlib.0.9.1,base-bytes.base,base64.3.5.0,cmdliner.1.1.1,cppo.1.6.9,csexp.1.5.1,dune.3.4.1,dune-configurator.3.4.1,lwt.5.6.1,ocaml-compiler-libs.v0.12.4,ocamlbuild.0.14.1,ocamlfind.1.9.5,ocplib-endian.1.2,ppx_derivers.1.2.1,ppx_deriving_rpc.9.0.0,ppxlib.0.27.0,result.1.5,rpc.9.0.0,rpclib.9.0.0,rpclib-lwt.9.0.0,rresult.0.7.0,seq.base,sexplib0.v0.15.1,stdlib-shims.0.3.0,topkg.1.0.5,xmlm.1.4.0,yojson.2.0.2' returned 20