gr-soapy with lime driver no go

Hail,
My rtl-sdr soapy source block runs with attached hardware but
running the flow graph with the lime source block throws out the
unpleasant response:

File "./test39_lime-sdr.py", line 88, in __init__
stream_args, tune_args, settings)
RuntimeError: SoapySDR::Device::make() no match

> SoapySDRUtil --find="driver=lime"
######################################################
## Soapy SDR -- the SDR abstraction library ##
######################################################

Found device 0
addr = 1d50:6108
driver = lime
label = LimeSDR-USB [USB 3.0] 9081C05C4212E
media = USB 3.0
module = FX3
name = LimeSDR-USB
serial = 0009081C05C4212E


--init--
self.soapy_limesdr_source_0 = None
dev = 'driver=lime'
stream_args = ''
tune_args = ['']
settings = ['']

self.soapy_limesdr_source_0 = soapy.source(dev, "fc32", 1,
"driver='lime'",stream_args, tune_args, settings)

I don't know why the dev_args input of "driver='lime'" is required.

git branch gnuradio 3.9-maint
built with PyBOMBS (on 2021-10-09)
opensuse Leap 15.2.

The web page https://wiki.gnuradio.org/index.php/Soapy was informative
but didn't tell me where to go next with this. Before I begin the
daunting (for a non-developer) task of exploring more deeply, I thought
to query this forum for obvious suggestions or known solution (or bug
status).

Rick