load("//cargo:defs.bzl", "cargo_build_script") load(":toolchain.bzl", "dummy_env_var_toolchain") cargo_build_script( name = "bs", srcs = ["build.rs"], build_script_env = { "FROM_TOOLCHAIN": "$(FROM_TOOLCHAIN)", "MODIFIED_FROM_TOOLCHAIN": "modified$(FROM_TOOLCHAIN)", }, edition = "2021", toolchains = [":dummy_env_var_toolchain"], ) dummy_env_var_toolchain( name = "dummy_env_var_toolchain", )