"Failed to build the project and import the benchmark suite" with no apparent errors in output

[sflis]

I was trying out asv with my project but failed to get it event to run getting this output

$asv run
· Creating environments
· Discovering benchmarks
·· Uninstalling from virtualenv-py3.12
·· Building 698da480 <CAV-101376-expose-encoding-field> for virtualenv-py3.12...
·· Installing 698da480 <CAV-101376-expose-encoding-field> into virtualenv-py3.12
·· Failed to build the project and import the benchmark suite. 

when running in verbose mode I'm getting this:

   Building wheels for collected packages: dcap
     Building wheel for dcap (pyproject.toml): started
     Building wheel for dcap (pyproject.toml): finished with status 'done'
     Created wheel for dcap: filename=dcap-0.0.4.post17+git.698da480-py3-none-any.whl size=22315 sha256=a208536bddb65150a963462139a4156ab570ce73abc7129e43a41357908e501e
     Stored in directory: /tmp/pip-ephem-wheel-cache-3qlrv7ij/wheels/d6/c4/aa/2fddef2f981ba26e6e5d96b79c993cb2203ead973b3aa818db
   Successfully built dcap
·· Running '/usr/bin/git name-rev --name-only --exclude=remotes/* --no-undefined 698da480f911c26d790dc1062f19da2d6ea96690'
   OUTPUT -------->
   CAV-101376-expose-encoding-field
·· Installing 698da480 <CAV-101376-expose-encoding-field> into virtualenv-py3.12
·· Failed to build the project and import the benchmark suite.

with still no apparent errors, this includes the previous steps omitted from the output shown above. What would be the next step to track down the issue?