meson claims Unknown compiler(s): ['c++', 'g++', 'clang++', 'pgc++', 'icpc']

This is kinda weird: I have a very small dummy meson.build which errors out with:

meson.build:7:0: ERROR: Unknown compiler(s): [‘c++’, ‘g++’, ‘clang++’, ‘pgc++’, ‘icpc’]

Whereas it’s correct I don’t have any of those compilers on my system, there is also no indication in my meson.build that this would be needed.

The sample meson.build is:

project('sample',
	'c',
	version: '1.0.0',
	meson_version: '>= 0.47',
)

dep = dependency('doesnotexist', required: false)