these 20 derivations will be built:
  /nix/store/0wdg652v0iw3kh3bgcqnwr7lkvjs7n5d-unit-postgresql.service.drv
  /nix/store/sqm38gmx5kjml052livwq0lxfb7dkbm2-unit-postgresql.service.drv
  /nix/store/0z2x6fxaqy183cg2r56yv18r2c31n3cw-system-units.drv
  /nix/store/vbaypbxx9brr56mzhxgh3v0lin7j2nbp-unit-postgresql.service.drv
  /nix/store/ypl344m0klvgsk09jw4csq0p0yx92h0k-system-units.drv
  /nix/store/34h59j6ih03fvva9hxsqvxpcdccjmnxz-etc.drv
  /nix/store/345prlphyah7fdafwpxzx88cs47811nx-activate.drv
  /nix/store/lakclmfsv12d40lsg56ygxq21ikjsys2-system-units.drv
  /nix/store/6271a17nfh5sw6mbxbwszx02cpxm8mjz-etc.drv
  /nix/store/66wnavap7xnflawknrxvw8gnbknfvqmv-nixos-system-server-test.drv
  /nix/store/6xb06b0lbplpg3ir5nfnqajm6k5v7zww-activate.drv
  /nix/store/sjfwba7lchb6rmqm2s838afv0j2fq3i5-etc.drv
  /nix/store/n6m6vc7v968qmjvmlzrjsskrs5kvz8rw-activate.drv
  /nix/store/xysjfavrhfz9ph6ii1kk8b48fqkr8hw3-nixos-system-server-test.drv
  /nix/store/bm2z9shrh1i1aragapbx2pgkxmalghdj-nixos-system-server-test.drv
  /nix/store/3jg5bbpfyjr4flsizvfxn5k1crh1fwbs-closure-info.drv
  /nix/store/7v3mc6k7k8li0g1pl6qm406nn2cyap2c-run-nixos-vm.drv
  /nix/store/gf92qkkpxw6sa8gjyzw58fsf9n0qxh00-nixos-vm.drv
  /nix/store/hfcc0migl4r7yk7bf632nr433i3cn5v3-nixos-test-driver-http.drv
  /nix/store/fzs8v0qkq19k9hdra1pdxni9iip02h79-vm-test-run-http.drv