https://github.com/libcheck/check/releases/download/0.12.0/check-0.12.0.tar.gz
https://github.com/westes/flex/releases/download/v2.6.4/flex-2.6.4.tar.gz
https://github.com/mesonbuild/meson/releases/download/0.51.0/meson-0.51.0.tar.gz
https://github.com/ninja-build/ninja/archive/v1.9.0/ninja-1.9.0.tar.gz
https://github.com/shadow-maint/shadow/releases/download/4.7/shadow-4.7.tar.xz
https://github.com/systemd/systemd/archive/v242.tar.gz