these 17 derivations will be built:
  /nix/store/07lz8pv31gsa6apd5rgsxig7bybxwkyd-postgresql-migrate.drv
  /nix/store/gfdkfqzd4s13s2awngda3ivyng3fsryr-unit-postgresql-migrate.service.drv
  /nix/store/g5alar4m52j1a1drz2qxp1ivdml1c138-postgresql-init.drv
  /nix/store/rcvyjy0qcl6l31lz35i4pbfjfhlccdpi-unit-postgresql.service.drv
  /nix/store/12vyh7rj9f9gmwxvld0h7zdvpm4i0mzf-system-units.drv
  /nix/store/1hg7r6yw6a91vw1x3yl5ihdjz3x54zws-unit-postgresql.service.drv
  /nix/store/77n6537gv6a11ir02cn56dkykjwdbja5-system-units.drv
  /nix/store/62m6kmyi7vxw69jl3pgd8agqzyk0b3sa-etc.drv
  /nix/store/5fvmq3bjz4wg6kq9p1m1znmh1l3n6zjb-activate.drv
  /nix/store/hm1x6syl23nnqqv1vrr5sn4ri9l8mx5p-etc.drv
  /nix/store/fh797q2czphwcfmmf6izd4k9b9v9jcwv-activate.drv
  /nix/store/d6dzgyz6bm9ri96pm0yny8hnhzyqmavm-nixos-system-server-test.drv
  /nix/store/49a9idvgc9b02wv68dvx6llc48a87p6k-nixos-system-server-test.drv
  /nix/store/gwwlqyz54h0yii6vrfmm2kwl0jsvd4pd-run-nixos-vm.drv
  /nix/store/sjhjnrb8qp8sq9zdp83bni0in28axmy1-nixos-vm.drv
  /nix/store/vn0a2c6w2j73lc094p8alfa4vn9jma56-nixos-test-driver-amcheck-upgrade.drv
  /nix/store/9xvzcpfkqmicad5z11aa0hh78np8l83b-vm-test-run-amcheck-upgrade.drv
these 7 paths will be fetched (90.5 KiB download, 615.6 KiB unpacked):
  /nix/store/fpwa5qmh802hlnna0gvn2brl6il7r886-closure-info
  /nix/store/q5j45hp6k3ha3d2m79mi6nndjnfc4krm-etc
  /nix/store/s25hp8v1fd59nv2zghdqq98d78b76nf9-postgresql-migrate
  /nix/store/2dq7w99pm1fxvi1m5dmk9xrnj23lhdiw-system-units
  /nix/store/vz8jf1aqsrlbn3wvxas5ddcxn4iwfc76-system-units
  /nix/store/bcy56bdfwsf4b1zi5n487yrbkkgwdki5-unit-postgresql.service
  /nix/store/p370kgfms8wzh501yks6phmm8i6jw71v-unit-postgresql.service
don't know how to build these paths:
  /nix/store/f7d99kh46rl9h68x1wz8133nwb552mnh-nixos-system-server-test
  /nix/store/jsz7d59sb99w38dd3zma38b14yigg8jc-postgresql-init
  /nix/store/rb3ggjkcpj9pvh1szrwjwkjrh12dmx43-nixos-system-server-test
  /nix/store/v2gm1c5mddsh0qcq7mvg6r41pp8a57n4-etc
  /nix/store/ywih20fmrzvp83acx0kr0lw6msz28lzw-unit-postgresql-migrate.service