how to reference crate with an alias

[pdeva]

cargo allows using multiple versions of a crate. in our dependencies ssection we have:

workspace cargo.toml

tower = { version = "0.5.0", features = ["full"] }
tower-0-4 = { package = "tower", version = "0.4" }

service cargo.toml

tower = { workspace = true }
tower-0-4 = { workspace = true }

this works perfectly fine with cargo build.

however, with bazel we get this error:

ERROR: no such package '@@[unknown repo 'crate_index__tower-0.4.13' requested from @@]//': The repository '@@[unknown repo 'crate_index__tower-0.4.13' requested from @@]' could not be resolved: No repository visible as '@crate_index__tower-0.4.13' from main repository
ERROR: /home/pdeva/code/monorepo/services/turmoil-proxies/BUILD:7:13: no such package '@@[unknown repo 'crate_index__tower-0.4.13' requested from @@]//': The repository '@@[unknown repo 'crate_index__tower-0.4.13' requested from @@]' could not be resolved: No repository visible as '@crate_index__tower-0.4.13' from main repository and referenced by '//services/turmoil-proxies:turmoil-proxies'
Target //:buildifier failed to build
Use --verbose_failures to see the command lines of failed build steps.
ERROR: Analysis of target '//services/turmoil-proxies:turmoil-proxies' failed; build aborted: Analysis failed

i do use the aliases function:

rust_library(
    name = "turmoil-proxies",
    srcs = glob(
        ["src/**/*.rs"],
        exclude = ["main.rs"],
    ),
    aliases = aliases(normal=True),
    crate_name = "turmoil_proxies",
    visibility = ["//visibility:public"],
    proc_macro_deps = all_crate_deps(
        proc_macro = True,
    ),
    rustc_flags = [
        "-C",
        "target-feature=+crt-static",
    ],
    deps = BUILD_DEPENDENCIES,
)

how do we use multiple versions of a crate with rules_rust?