Cannot determine driver version when DYLINT_DRIVER_PATH is set

[smoelius]

$ DYLINT_DRIVER_PATH=$PWD/target/dylint_drivers cargo dylint --all --workspace
    Updating git repository `https://github.com/trailofbits/dylint`
    Finished release [optimized] target(s) in 0.17s
Error: command failed: "/home/smoelius/github/trailofbits/test-fuzz/target/dylint_drivers/nightly-2021-06-03-x86_64-unknown-linux-gnu/dylint-driver" "-V"
stdout: ""
stderr: "/home/smoelius/github/trailofbits/test-fuzz/target/dylint_drivers/nightly-2021-06-03-x86_64-unknown-linux-gnu/dylint-driver: error while loading shared libraries: librustc_driver-f0cc9de4b9df9abc.so: cannot open shared object file: No such file or directory\n"

The library exists, but it's not being found:

$ find ~/.rustup/ -name librustc_driver-f0cc9de4b9df9abc.so
/home/smoelius/.rustup/toolchains/nightly-2021-06-03-x86_64-unknown-linux-gnu/lib/librustc_driver-f0cc9de4b9df9abc.so
/home/smoelius/.rustup/toolchains/nightly-2021-06-03-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_driver-f0cc9de4b9df9abc.so

The problem doesn't occur when DYLINT_DRIVER_PATH is not set.