Fix benchmarks failing silently #298

Job	Run time
check-changes	17s
ran-none	0s
start-nix-macos-apple-silicon-tests / nix-apple-silicon	30m 43s
start-nix-linux-x86-64-tests / nix-linux-x86	39m 28s
start-macos-x86-64-tests / test-rust-macos-x86-64	15m 47s
start-nix-linux-aarch64-build-default-test / nix-linux-arm64	59m 11s
start-nix-linux-aarch64-cargo-build-test / nix-linux-arm64	44m 35s
start-roc-benchmarks / benchmark roc programs	3m 54s
start-ubuntu-x86-64-tests / test zig, rust, wasm...	18m 45s
start-windows-release-build-test / windows-release-build	11m 18s
start-windows-tests / windows-test-subset	32m 46s
ran-full	0s
finish	1s
	4h 16m 45s

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