these 6 derivations will be built:
  /nix/store/7gksjcwgs5xyl952yqb60idic5lrxn9g-nixos-system-server-test.drv
  /nix/store/yycy8zmhs3q2l7ihd8szmgsbp1c2y4ar-closure-info.drv
  /nix/store/23yhj0vgh966x0vm0gns0gs4qvpc65g9-run-nixos-vm.drv
  /nix/store/ghfrvndg3jrdwsdbb8py6yxwpkmjzh20-nixos-vm.drv
  /nix/store/kq81ncg2s8g3lslgi9g00vj91gx7zhy1-nixos-test-driver-pgrouting.drv
  /nix/store/31haf052pqk7mm4ivqicj9c5igidww27-vm-test-run-pgrouting.drv