Build Log: ocaml-config.0

Can't find all required versions. Selected: base-bigarray.base base-domains.base base-nnp.base base-threads.base base-unix.base ocaml-options-vanilla.1 ocaml&ocaml-config ocaml-base-compiler system-mingw ocaml base-domains ocaml-base-compiler - ocaml -> ocaml.5.2.1 User requested = 5.2.1 - ocaml-base-compiler -> ocaml-base-compiler.5.2.1 ocaml-base-compiler|ocaml-variants|ocaml-system|dkml-base-compiler ocaml-base-compiler requires >= 5.2.1~ & < 5.2.2~ - ocaml-config -> (problem) User requested = 0 ocaml 5.2.1 requires >= 3 Rejected candidates: ocaml-config.0: Incompatible with restriction: >= 3 - system-mingw -> (problem) No known implementations at all