Fix Appveyor CI builds #2593

Job	Run time
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, no, no)	4m 49s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, no, libusb-1.0)	6m 19s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, no, libusb-0.1)	4m 48s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, nss, no)	4m 38s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, nss, libusb-1.0)	6m 20s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, nss, libusb-0.1)	5m 8s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, openssl, no)	4m 52s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, openssl, libusb-1.0)	9m 50s
Analyze (cpp, ubuntu-latest, CC=gcc CXX=g++, openssl, libusb-0.1)	5m 8s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, no, no)	4m 43s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, no, libusb-1.0)	4m 55s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, no, libusb-0.1)	5m 0s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, nss, no)	4m 55s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, nss, libusb-1.0)	5m 16s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, nss, libusb-0.1)	5m 3s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, openssl, no)	4m 49s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, openssl, libusb-1.0)	5m 13s
Analyze (cpp, ubuntu-latest, CC=clang CXX=clang++, openssl, libusb-0.1)	5m 21s
Analyze (python, ubuntu-latest, PYTHON=python3, no, no)	1m 29s
	1h 38m 36s

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