Trouble building on Ubuntu 20.04 No module named PyQt5.pyrcc_main

[stuaxo]

Apologies, I can't work out what to install to sort out an error using pyrcc:

$ make
make -C c++/jackmeter
make[1]: Entering directory '/home/stu/projects/external/Cadence/c++/jackmeter'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/stu/projects/external/Cadence/c++/jackmeter'
make -C c++/xycontroller
make[1]: Entering directory '/home/stu/projects/external/Cadence/c++/xycontroller'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/stu/projects/external/Cadence/c++/xycontroller'
pyrcc5 resources/resources.qrc -o src/resources_rc.py
Traceback (most recent call last):
  File "/home/stu/.local/bin/pyrcc5", line 6, in <module>
    from PyQt5.pyrcc_main import main
ModuleNotFoundError: No module named 'PyQt5.pyrcc_main'
make: *** [Makefile:42: src/resources_rc.py] Error 1