these 3 derivations will be built:
  /nix/store/lynk6hfy311yi3fz00aqcj9dgvds35vf-docs-site-main-site.conf.drv
  /nix/store/mbsgczkbwkg3j20hin4nyr2w30qbmz0f-docs-site-main-nginx.conf.drv
  /nix/store/wx7ris0p9j7hb77fxvjrg3chg0g4w671-docs-backend-test.drv