these 3 derivations will be built:
  /nix/store/4d8fmnrl0xpa0yz3081vhd5al8n8cvj2-docs-site-main-site.conf.drv
  /nix/store/dyfv5rgki774870mx7dvgd7yipk84ld4-docs-site-main-nginx.conf.drv
  /nix/store/2qk1g1ha81vaphs9jkrmadrq13llf6rm-docs-backend-test.drv