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As documented here: rust-lang/cargo#12482
We should not be using rerun-if-env-changed here.
It causes needless rebuilds when running
cargo build
from within our binary and that happens within tokio-bin-process's BinProcess::start_crate_nameHowever we cannot have no rerun clauses as that causes cargo to rebuild every time.
So instead we do the documented workaround of adding
rerun-if-changed=build.rs
: https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorerun-if-changedpath