[bzlmod] Failed to parse label from string

[mering]

When using the following cargo config in my MODULE.bazel:

use_repo(non_module_deps, "zenohd")
crate.from_cargo(
    name = "zenohd_deps",
    cargo_lockfile = "//third_party/zenoh:zenohd.Cargo.lock",
    manifests = ["@zenohd//:Cargo.toml"],
)

I do get the following error:

ERROR: Traceback (most recent call last):
        File "/home/builder/.cache/bazel/_bazel_builder/395eea75460def8a11dd35795d615210/external/rules_rust~override/crate_universe/extension.bzl", line 227, column 37, in _crate_impl
                _generate_hub_and_spokes(module_ctx, cargo_bazel, cfg, annotations)
        File "/home/builder/.cache/bazel/_bazel_builder/395eea75460def8a11dd35795d615210/external/rules_rust~override/crate_universe/extension.bzl", line 85, column 16, in _generate_hub_and_spokes
                cargo_bazel([
        File "/home/builder/.cache/bazel/_bazel_builder/395eea75460def8a11dd35795d615210/external/rules_rust~override/crate_universe/private/module_extensions/cargo_bazel_bootstrap.bzl", line 51, column 17, in run
                fail("%s returned with exit code %d:\n%s" % (pretty_args, result.return_code, result.stderr))
Error in fail: /home/builder/.cache/bazel/_bazel_builder/395eea75460def8a11dd35795d615210/external/rules_rust~override~cargo_bazel_bootstrap~cargo_bazel_bootstrap/cargo-bazel splice --output-dir /home/builder/.cache/bazel/_bazel_builder/395eea75460def8a11dd35795d615210/modextwd/rules_rust~override~crate/zenohd_deps/splicing-output --config /home/builder/.cache/bazel/_bazel_builder/395eea75460def8a11dd35795d615210/modextwd/rules_rust~override~crate/zenohd_deps/config.json --splicing-manifest /home/builder/.cache/bazel/_bazel_builder/395eea75460def8a11dd35795d615210/modextwd/rules_rust~override~crate/zenohd_deps/splicing_manifest.json --cargo-lockfile /workspaces/insrc/third_party/zenoh/zenohd.Cargo.lock --cargo /home/builder/.cache/bazel/_bazel_builder/395eea75460def8a11dd35795d615210/external/rules_rust~override~rust~rust_host_tools/bin/cargo --rustc /home/builder/.cache/bazel/_bazel_builder/395eea75460def8a11dd35795d615210/external/rules_rust~override~rust~rust_host_tools/bin/rustc returned with exit code 1:
Error: Failed to load SplicingManifest

Caused by:
    Failed to parse label from string: @@_main~non_module_deps_ext~zenohd//:Cargo.toml at line 5 column 188