cli: Fix error message when the host platform is unknown #159

	name: Continuous integration checks

	on:
	push:
	schedule:
	- cron: '0 0 * * 0' # weekly

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.7, 3.8, 3.9, "3.10"]

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements_dev.txt
	pip freeze
	- name: Test with pytest
	run: \|
	make test

	quality:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python 3.10
	uses: actions/setup-python@v2
	with:
	python-version: '3.10'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements_dev.txt
	pip freeze
	- name: Run quality checks
	run: \|
	make quality

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