Can't locate JSON.pm in @INC

[eserte]

t/00-load.t fails if JSON.pm (which is not a core perl module) is not installed:

...
Can't locate JSON.pm in @INC (you may need to install the JSON module) (@INC contains:  ...  .) at /home/cpansand/.cpan/build/2025041219/Lab-Measurement-3.930-3/blib/lib/Lab/Moose/Instrument/Bluefors_Temp.pm line 23.
BEGIN failed--compilation aborted at /home/cpansand/.cpan/build/2025041219/Lab-Measurement-3.930-3/blib/lib/Lab/Moose/Instrument/Bluefors_Temp.pm line 23.
Compilation failed in require at t/00-load.t line 121.
# Looks like your test exited with 2 just after 49.
t/00-load.t ............................. 
Dubious, test returned 2 (wstat 512, 0x200)
Failed 68/117 subtests 
...