;; What follows is a "manifest" equivalent to the command line you gave.
;; You can store it in a file that you may then pass to any 'guix' command
;; that accepts a '--manifest' (or '-m') option.

(use-modules (guix transformations))

(define ocaml-latest
  (options->transformation
    '((with-version . "ocaml=5.3.0"))))

(packages->manifest
  (list (specification->package "gcc-toolchain")
        (ocaml-latest (specification->package "ocaml"))
        (specification->package "opam")
        (specification->package "node")
        (specification->package "pkg-config")
        (specification->package "gmp")
        (specification->package "hyperfine")
        (specification->package "unzip")))