Unable to Find Custom Root

[czhang03]

Hi, I am using vscodium within flatpak, with the ocaml sdk extension, which recommends a custom root for opam.

I have the following setting in for my project:

    "ocaml.sandbox": {
        "root": "${env:XDG_DATA_HOME}/ocaml",
        "kind": "opam",
        "switch": ".",
    },

and ocaml cannot seem to set the root correctly:

$ ocamlc --version
5.0.0

$ ocamllsp --version

$ /usr/lib/sdk/ocaml/bin/opam --version
$ /usr/lib/sdk/ocaml/bin/opam --version
2.1.5

$ /usr/lib/sdk/ocaml/bin/opam var --global root
2.1.5

$ /usr/lib/sdk/ocaml/bin/opam var --global root
[ERROR] Opam has not been initialised, please run `opam init'

[ERROR] Opam has not been initialised, please run `opam init'

However, using the following command:

eval $(opam env --root=$XDG_DATA_HOME/ocaml --switch=. --set-root --set-switch)

can set the root and switch correctly in the vscode terminal. Is there any way to make custom root work? Thanks!