Gradle's buildRustCertgen task uses commandLine("cargo", ...), which
ProcessBuilder resolves against the daemon's inherited PATH rather
than the env injected via Exec.environment(). Non-login shells (CI,
IDE-spawned terminals, fresh tmux panes) don't source the profile.d
hook that prepends ~/.cargo/bin, so the daemon dies with
"A problem occurred starting process 'command 'cargo''" even when
rustup is installed. Prepending ~/.cargo/bin at script entry makes
the script self-contained regardless of how the shell was launched.
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