these 2 derivations will be built:
  /nix/store/ki87j87yvmdl6qpdq506dj33gcdm1hbh-install-flatpak-bridge-test.drv
  /nix/store/x8d60l9vy13r7hxm46pdhdbafjr2s7bj-thunderbird-cli-flatpak-test.drv