libguestfs compile - OCaml findlib package hivex... not found

Slackware64-current

Struggling to compile libguestfs to manage qemu images.
I compiled all dependencies:
augeas-1.14.1
ocaml-4.14.2
ocamlbuild-0.14.3
ocaml-findlib-1.9.6
supermin-5.3.4
hivex-1.3.23
ocaml-num-1.5
dune-3.15.3
opam-2.1.6

compiling slackbuild script libguestfs at .configure stage returns:

Quote:

--- Checking for OCaml --- checking for ocamlc... ocamlc OCaml version is 4.14.2 OCaml library path is /usr/lib64/ocaml checking for ocamlopt... ocamlopt checking for ocamlc.opt... ocamlc.opt checking for ocamlopt.opt... ocamlopt.opt checking for ocamldep... ocamldep checking for ocamlmktop... ocamlmktop checking for ocamlmklib... ocamlmklib checking for ocamldoc... ocamldoc checking for ocamlbuild... ocamlbuild checking for ocamlfind... ocamlfind checking if OCaml version >= 4.07... yes (4, 14) checking if OCaml i-runtime-variant _pici works... yes checking for OCaml findlib package hivex... not found configure: error: the OCaml module 'hivex' is required

Quote:

ocamlfind --help Usage: ocamlfind query [-help | other options] <package_name> ... or: ocamlfind ocamlc [-help | other options] <file> ... or: ocamlfind ocamlcp [-help | other options] <file> ... or: ocamlfind ocamlmklib [-help | other options] <file> ... or: ocamlfind ocamlmktop [-help | other options] <file> ... or: ocamlfind ocamlopt [-help | other options] <file> ... or: ocamlfind ocamloptp [-help | other options] <file> ... or: ocamlfind ocamldep [-help | other options] <file> ... or: ocamlfind ocamlbrowser [-help | other options] or: ocamlfind ocamldoc [-help | other options] <file> ... or: ocamlfind install [-help | other options] <package_name> <file> ... or: ocamlfind remove [-help | other options] <package_name> or: ocamlfind printppx [-help | other options] <package_name> ... or: ocamlfind printconf [-help] [variable] or: ocamlfind lint [-help] <file> or: ocamlfind list or: ocamlfind pkg/cmd arg ... Select toolchain with: ocamlfind -toolchain <t> <command> Abbreviations: e.g. ocamlfind opt instead of ocamlfind ocamlopt

Quote:

hivexsh -h hivexsh: invalid option -- 'h' hivexsh [-dfwu] [hivefile]

As above ocamlfind and hivex are installed and work.
What could be the problem?