[nix-shell:~/projects/vd-rails-deploy]$ stage_deploy
building the system configuration...
warning: you did not specify '--add-root'; the result might be removed by the garbage collector
these derivations will be built:
  /nix/store/cwgrvr8vhzxijwrvigp4kxdslmsfizn2-source.drv
  /nix/store/zs02k251cv0y3nvih7n50csgl4112laa-gitlab-runner-9.4.0.drv
  /nix/store/5gsfik4fdp7rqiyn6fkj44gijvfncgaz-unit-script.drv
  /nix/store/c33l2ww9qlc92nzi7sfhs0f3zj7fa1wy-unit-script.drv
  /nix/store/h2lg70c6gjgsj537hdlqn8xks5msaabn-unit-script.drv
  /nix/store/59kpsqp2b4v9l15dbrfipsz6vy9s9dmx-unit-gitlab-runner-docker.service.drv
  /nix/store/gj4s250vcigx11088bg9hva58is01vy7-system-units.drv
  /nix/store/vi9ml72ws4crgdjwmnyqnqzbnmz5pwz8-etc.drv
  /nix/store/313iyv8izc832bghpk2s99y6mvf645km-nixos-system-stage-18.09pre-git.drv
building '/nix/store/cwgrvr8vhzxijwrvigp4kxdslmsfizn2-source.drv'...

trying https://gitlab.com/api/v4/projects/gitlab-org%2Fgitlab-ci-multi-runner/repository/archive.tar.gz?sha=v9.4.0
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
curl: (22) The requested URL returned error: 404 Not Found
error: cannot download source from any mirror
builder for '/nix/store/cwgrvr8vhzxijwrvigp4kxdslmsfizn2-source.drv' failed with exit code 1
cannot build derivation '/nix/store/zs02k251cv0y3nvih7n50csgl4112laa-gitlab-runner-9.4.0.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/5gsfik4fdp7rqiyn6fkj44gijvfncgaz-unit-script.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/c33l2ww9qlc92nzi7sfhs0f3zj7fa1wy-unit-script.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/h2lg70c6gjgsj537hdlqn8xks5msaabn-unit-script.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/59kpsqp2b4v9l15dbrfipsz6vy9s9dmx-unit-gitlab-runner-docker.service.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/gj4s250vcigx11088bg9hva58is01vy7-system-units.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/vi9ml72ws4crgdjwmnyqnqzbnmz5pwz8-etc.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/313iyv8izc832bghpk2s99y6mvf645km-nixos-system-stage-18.09pre-git.drv': 1 dependencies couldn't be built
error: build of '/nix/store/313iyv8izc832bghpk2s99y6mvf645km-nixos-system-stage-18.09pre-git.drv' failed