`cargo xtask releng --output-dir` seems to assume absolute path?

I tried this:

$ cargo xtask releng --output-dir=./tuf-repo
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.54s
     Running `target/debug/xtask releng --output-dir=./tuf-repo`
    Finished `release` profile [optimized] target(s) in 0.74s
     Running `target/release/omicron-releng --output-dir=./tuf-repo`
Mar 02 13:55:48.168 DEBG changing working directory to /home/dap/omicron-work
Mar 02 13:55:48.268 DEBG running: git rev-parse HEAD
Mar 02 13:55:48.272 DEBG process exited with exit status: 0 (4.154426ms)
Mar 02 13:55:48.272 INFO version: 19.0.0-0.local+gitc0717a4a94e
Mar 02 13:55:48.281 DEBG running: git -C /home/dap/helios rev-parse --verify HEAD^{commit}
Mar 02 13:55:48.286 DEBG process exited with exit status: 0 (4.508662ms)
Mar 02 13:55:48.286 DEBG running: git ls-remote --exit-code https://github.com/oxidecomputer/helios.git HEAD
Mar 02 13:55:49.601 DEBG process exited with exit status: 0 (1.31488929s)
Mar 02 13:55:49.601 DEBG running: pkg verify -q /system/zones/brand/omicron1/tools
Mar 02 13:55:50.617 DEBG process exited with exit status: 0 (1.016342383s)
Mar 02 13:55:50.617 DEBG running: zfs list rpool/images/dap/host
NAME                    USED  AVAIL     REFER  MOUNTPOINT
rpool/images/dap/host    24K  41.8G       24K  /rpool/images/dap/host
Mar 02 13:55:50.623 DEBG process exited with exit status: 0 (5.576018ms)
Mar 02 13:55:50.623 DEBG running: zfs list rpool/images/dap/recovery
NAME                        USED  AVAIL     REFER  MOUNTPOINT
rpool/images/dap/recovery    24K  41.8G       24K  /rpool/images/dap/recovery
Mar 02 13:55:50.628 DEBG process exited with exit status: 0 (5.848111ms)
Mar 02 13:55:50.629 INFO [hubris-production] running task
Mar 02 13:55:50.629 INFO [helios-incorp] running task
Mar 02 13:55:50.629 INFO [hubris-staging] running task
Mar 02 13:55:50.629 INFO [helios-incorp] task succeeded (109.445µs)
Mar 02 13:55:50.629 INFO [omicron-package] running: ptime -m /claude/.rustup/toolchains/1.91.1-x86_64-unknown-illumos/bin/cargo build --locked --release --bin omicron-package
Mar 02 13:55:50.631 INFO [helios-setup] running: BUILD_OS=no PWD=/home/dap/helios ptime -m gmake setup
[    helios-setup] cd tools/helios-build && cargo build --quiet
[ omicron-package]     Blocking waiting for file lock on package cache
Mar 02 13:55:51.856 ERRO [hubris-staging] task failed (1.226523434s)
Error: failed to write to file `./tuf-repo/hubris-staging/./tuf-repo/hubris-staging/a5f17a81c251cc34fb19b87eda48c521bcf1bcd8f433b0694cd7009603f52fe4.zip`: No such file or directory (os error 2)

when I passed $PWD/tuf-repo instead, it got past that error.

Reproduce the issue with cargo xtask releng --output-dir=./tuf-repo, then compare it with the working $PWD/tuf-repo invocation. Start at the cargo xtask releng and omicron-releng entry points mentioned in the output; done means a relative output directory works without duplicating the path and produces the expected repository files.