bitstring 3.1.1

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 cwe_checker.0.2 & zed.3.1.0 & zarith.1.13 & yojson.2.1.2 & variantslib.v0.11.0 & uutf.1.0.3 & uuidm.0.9.7 & utop.2.9.2 & uri.3.1.0 & typerep.v0.11.0 & trie.1.0.0 & topkg.1.0.7 & text-tags.2.0.0 & stringext.1.6.0 & stdlib-shims.0.3.0 & stdio.v0.11.0 & splittable_random.v0.11.0 & sexplib0.v0.11.0 & sexplib.v0.11.0 & seq.base & result.1.5 & regular.2.0.0 & react.1.2.1 & re.1.11.0 & ppxlib.0.8.1 & ppx_variants_conv.v0.11.1 & ppx_typerep_conv.v0.11.1 & ppx_tools_versioned.5.4.0 & ppx_sexp_value.v0.11.0 & ppx_sexp_message.v0.11.0 & ppx_sexp_conv.v0.11.2 & ppx_pipebang.v0.11.0 & ppx_optional.v0.11.0 & ppx_optcomp.v0.11.0 & ppx_let.v0.11.0 & ppx_js_style.v0.11.0 & ppx_jane.v0.11.0 & ppx_inline_test.v0.11.0 & ppx_here.v0.11.0 & ppx_hash.v0.11.1 & ppx_fields_conv.v0.11.0 & ppx_fail.v0.11.0 & ppx_expect.v0.11.1 & ppx_enumerate.v0.11.1 & ppx_derivers.1.2.1 & ppx_custom_printf.v0.11.0 & ppx_compare.v0.11.1 & ppx_bin_prot.v0.11.1 & ppx_bench.v0.11.0 & ppx_base.v0.11.0 & ppx_assert.v0.11.0 & parsexp.v0.11.0 & ogre.2.0.0 & octavius.1.2.2 & ocplib-endian.1.2 & ocamlmod.0.0.9 & ocamlify.0.0.1 & ocamlgraph.2.0.0 & ocamlfind.1.9.6 & ocamlbuild.0.14.3 & ocaml-syntax-shims.1.0.0 & ocaml-migrate-parsetree.1.8.0 & ocaml-compiler-libs.v0.12.4 & oasis.0.4.11 & num.1.5 & monads.2.0.0 & mmap.1.2.0 & mew_vi.0.5.0 & mew.0.1.0 & lwt_react.1.1.5 & lwt_log.1.1.2 & lwt.5.5.0 & lambda-term.3.1.0 & jbuilder.1.0+beta20.2 & jane-street-headers.v0.11.0 & graphlib.2.0.0 & fmt.0.8.9 & fileutils.0.6.4 & fieldslib.v0.11.0 & FrontC.3.4.3-1 & dune-configurator.3.15.3 & dune.3.15.3 & csexp.1.5.2 & cppo.1.6.9 & core_kernel.v0.11.1 & configurator.v0.11.0 & conf-zlib.1 & conf-which.1 & conf-pkg-config.3 & conf-gmp.4 & conf-env-travis.1 & conf-binutils.0.2 & conf-bap-llvm.1.6 & cmdliner.1.0.4 & charInfo_width.1.1.0 & camomile.1.0.2 & camlzip.1.11 & bitvec-sexp.2.0.0 & bitvec-order.2.0.0 & bitvec-binprot.2.0.0 & bitvec.2.0.0 & bitstring.3.1.1 & bin_prot.v0.11.0 & bigarray-compat.1.1.0 & base-bytes.base & base.v0.11.1 & bare.2.0.0 & bap-x86.2.0.0 & bap-warn-unused.2.0.0 & bap-trivial-condition-form.2.0.0 & bap-traces.2.0.0 & bap-trace.2.0.0 & bap-term-mapper.2.0.0 & bap-taint-propagator.2.0.0 & bap-taint.2.0.0 & bap-symbol-reader.2.0.0 & bap-strings.2.0.0 & bap-std.2.0.0 & bap-ssa.2.0.0 & bap-signatures.2.3.0 & bap-run.2.0.0 & bap-report.2.0.0 & bap-relocatable.2.0.0 & bap-recipe-command.2.0.0 & bap-recipe.2.0.0 & bap-raw.2.0.0 & bap-print.2.0.0 & bap-primus-x86.2.0.0 & bap-primus-test.2.0.0 & bap-primus-support.2.0.0 & bap-primus-region.2.0.0 & bap-primus-powerpc.2.0.0 & bap-primus-lisp.2.0.0 & bap-primus-dictionary.2.0.0 & bap-primus.2.0.0 & bap-powerpc.2.0.0 & bap-plugins.2.0.0 & bap-optimization.2.0.0 & bap-objdump.2.0.0 & bap-mips.2.0.0 & bap-microx.2.0.0 & bap-mc.2.0.0 & bap-main.2.0.0 & bap-llvm.2.0.0 & bap-knowledge.2.0.0 & bap-future.2.0.0 & bap-frontend.2.0.0 & bap-frontc.2.0.0 & bap-emacs-mode.0.1 & bap-emacs-goodies.0.1 & bap-emacs-dot.0.1 & bap-elf.2.0.0 & bap-elementary.2.0.0 & bap-dwarf.2.0.0 & bap-dump-symbols.2.0.0 & bap-disassemble.2.0.0 & bap-demangle.2.0.0 & bap-cxxfilt.2.0.0 & bap-core-theory.2.0.0 & bap-constant-tracker.2.0.0 & bap-callsites.2.0.0 & bap-cache.2.0.0 & bap-c.2.0.0 & bap-byteweight.2.0.0 & bap-bundle.2.0.0 & bap-build.2.0.0 & bap-bil.2.0.0 & bap-beagle.2.0.0 & bap-arm.2.0.0 & bap-api.2.0.0 & bap-abi.2.0.0 & bap.2.0.0 & astring.0.8.5 & alcotest.1.5.0:   * Missing dependency:
            - conf-bap-llvm >= 1.4
            depends on the unavailable system package 'llvm-9-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=cwe_checker.0.2,zed.3.1.0,zarith.1.13,yojson.2.1.2,variantslib.v0.11.0,uutf.1.0.3,uuidm.0.9.7,utop.2.9.2,uri.3.1.0,typerep.v0.11.0,trie.1.0.0,topkg.1.0.7,text-tags.2.0.0,stringext.1.6.0,stdlib-shims.0.3.0,stdio.v0.11.0,splittable_random.v0.11.0,sexplib0.v0.11.0,sexplib.v0.11.0,seq.base,result.1.5,regular.2.0.0,react.1.2.1,re.1.11.0,ppxlib.0.8.1,ppx_variants_conv.v0.11.1,ppx_typerep_conv.v0.11.1,ppx_tools_versioned.5.4.0,ppx_sexp_value.v0.11.0,ppx_sexp_message.v0.11.0,ppx_sexp_conv.v0.11.2,ppx_pipebang.v0.11.0,ppx_optional.v0.11.0,ppx_optcomp.v0.11.0,ppx_let.v0.11.0,ppx_js_style.v0.11.0,ppx_jane.v0.11.0,ppx_inline_test.v0.11.0,ppx_here.v0.11.0,ppx_hash.v0.11.1,ppx_fields_conv.v0.11.0,ppx_fail.v0.11.0,ppx_expect.v0.11.1,ppx_enumerate.v0.11.1,ppx_derivers.1.2.1,ppx_custom_printf.v0.11.0,ppx_compare.v0.11.1,ppx_bin_prot.v0.11.1,ppx_bench.v0.11.0,ppx_base.v0.11.0,ppx_assert.v0.11.0,parsexp.v0.11.0,ogre.2.0.0,octavius.1.2.2,ocplib-endian.1.2,ocamlmod.0.0.9,ocamlify.0.0.1,ocamlgraph.2.0.0,ocamlfind.1.9.6,ocamlbuild.0.14.3,ocaml-syntax-shims.1.0.0,ocaml-migrate-parsetree.1.8.0,ocaml-compiler-libs.v0.12.4,oasis.0.4.11,num.1.5,monads.2.0.0,mmap.1.2.0,mew_vi.0.5.0,mew.0.1.0,lwt_react.1.1.5,lwt_log.1.1.2,lwt.5.5.0,lambda-term.3.1.0,jbuilder.1.0+beta20.2,jane-street-headers.v0.11.0,graphlib.2.0.0,fmt.0.8.9,fileutils.0.6.4,fieldslib.v0.11.0,FrontC.3.4.3-1,dune-configurator.3.15.3,dune.3.15.3,csexp.1.5.2,cppo.1.6.9,core_kernel.v0.11.1,configurator.v0.11.0,conf-zlib.1,conf-which.1,conf-pkg-config.3,conf-gmp.4,conf-env-travis.1,conf-binutils.0.2,conf-bap-llvm.1.6,cmdliner.1.0.4,charInfo_width.1.1.0,camomile.1.0.2,camlzip.1.11,bitvec-sexp.2.0.0,bitvec-order.2.0.0,bitvec-binprot.2.0.0,bitvec.2.0.0,bitstring.3.1.1,bin_prot.v0.11.0,bigarray-compat.1.1.0,base-bytes.base,base.v0.11.1,bare.2.0.0,bap-x86.2.0.0,bap-warn-unused.2.0.0,bap-trivial-condition-form.2.0.0,bap-traces.2.0.0,bap-trace.2.0.0,bap-term-mapper.2.0.0,bap-taint-propagator.2.0.0,bap-taint.2.0.0,bap-symbol-reader.2.0.0,bap-strings.2.0.0,bap-std.2.0.0,bap-ssa.2.0.0,bap-signatures.2.3.0,bap-run.2.0.0,bap-report.2.0.0,bap-relocatable.2.0.0,bap-recipe-command.2.0.0,bap-recipe.2.0.0,bap-raw.2.0.0,bap-print.2.0.0,bap-primus-x86.2.0.0,bap-primus-test.2.0.0,bap-primus-support.2.0.0,bap-primus-region.2.0.0,bap-primus-powerpc.2.0.0,bap-primus-lisp.2.0.0,bap-primus-dictionary.2.0.0,bap-primus.2.0.0,bap-powerpc.2.0.0,bap-plugins.2.0.0,bap-optimization.2.0.0,bap-objdump.2.0.0,bap-mips.2.0.0,bap-microx.2.0.0,bap-mc.2.0.0,bap-main.2.0.0,bap-llvm.2.0.0,bap-knowledge.2.0.0,bap-future.2.0.0,bap-frontend.2.0.0,bap-frontc.2.0.0,bap-emacs-mode.0.1,bap-emacs-goodies.0.1,bap-emacs-dot.0.1,bap-elf.2.0.0,bap-elementary.2.0.0,bap-dwarf.2.0.0,bap-dump-symbols.2.0.0,bap-disassemble.2.0.0,bap-demangle.2.0.0,bap-cxxfilt.2.0.0,bap-core-theory.2.0.0,bap-constant-tracker.2.0.0,bap-callsites.2.0.0,bap-cache.2.0.0,bap-c.2.0.0,bap-byteweight.2.0.0,bap-bundle.2.0.0,bap-build.2.0.0,bap-bil.2.0.0,bap-beagle.2.0.0,bap-arm.2.0.0,bap-api.2.0.0,bap-abi.2.0.0,bap.2.0.0,astring.0.8.5,alcotest.1.5.0' returned 20