Wrap the binaries from the current toolchain so that they can be easily invoked with bazel run:
bazel run @rules_rust//tools/upstream_wrapper:cargo bazel run @rules_rust//tools/upstream_wrapper:cargo -- clippy bazel run @rules_rust//tools/upstream_wrapper:cargo -- fmt bazel run @rules_rust//tools/upstream_wrapper:rustc -- main.rs bazel run @rules_rust//tools/upstream_wrapper:rustfmt
Alternatively, look at the bazel_env example to include them in the users path with direnv.