How can I correct these issues when building Epson scanner drivers?

Question

I am trying to get an Epson V30 scanner working under Gentoo Linux. To that end, I downloaded and attempted to build the drivers from their website: http://download.ebz.epson.net/dsc/search/01/search/?OSC=LX

As per the readme, I run ./configure before running make. However make check reveals problems:

make[3]: *** No rule to make target '../libimage-stream.la', needed by 'test-pcx'.  Stop.
make[3]: Leaving directory '/home/james/Downloads/iscan_extract/iscan-2.30.4/lib/tests'
make[2]: *** [Makefile:588: check-am] Error 2
make[2]: Leaving directory '/home/james/Downloads/iscan_extract/iscan-2.30.4/lib/tests'
make[1]: *** [Makefile:552: check-recursive] Error 1
make[1]: Leaving directory '/home/james/Downloads/iscan_extract/iscan-2.30.4/lib'
make: *** [Makefile:448: check-recursive] Error 1

I tried finding out where to get this libimage-stream.la but no luck:

~/Downloads/iscan_extract/iscan-2.30.4  
└✸Mon,Jul17@16:52:~$ e-file libimage-stream   
Traceback (most recent call last):
  File "/usr/lib/python-exec/python3.11/e-file", line 36, in <module>
    if len(files['result']) > 0:
           ~~~~~^^^^^^^^^^
KeyError: 'result'

If I just go ahead and do make, I get different errors, IDK if they are related to the problem identified by make check or are something else I will need to deal with.

Any assistance in getting these drivers to build would be welcome.