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 & yojson.2.1.2 & xmlm.1.4.0 & topkg.1.0.7 & stdlib-shims.0.3.0 & sexplib0.v0.17.0 & seq.base & rresult.0.7.0 & rpclib-lwt.9.0.0 & rpclib.9.0.0 & rpc.9.0.0 & result.1.5 & ppxlib.0.32.1 & ppx_deriving_rpc.9.0.0 & ppx_derivers.1.2.1 & ocplib-endian.1.2 & ocamlfind.1.9.6 & ocamlbuild.0.14.3 & ocaml-compiler-libs.v0.12.4 & lwt.5.7.0 & dune-configurator.3.15.3 & dune.3.15.3 & csexp.1.5.2 & cppo.1.6.9 & cmdliner.1.3.0 & base64.3.5.1 & base-bytes.base:   * 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,yojson.2.1.2,xmlm.1.4.0,topkg.1.0.7,stdlib-shims.0.3.0,sexplib0.v0.17.0,seq.base,rresult.0.7.0,rpclib-lwt.9.0.0,rpclib.9.0.0,rpc.9.0.0,result.1.5,ppxlib.0.32.1,ppx_deriving_rpc.9.0.0,ppx_derivers.1.2.1,ocplib-endian.1.2,ocamlfind.1.9.6,ocamlbuild.0.14.3,ocaml-compiler-libs.v0.12.4,lwt.5.7.0,dune-configurator.3.15.3,dune.3.15.3,csexp.1.5.2,cppo.1.6.9,cmdliner.1.3.0,base64.3.5.1,base-bytes.base' returned 20