these 6 derivations will be built:
  /nix/store/njiq1swf2q4cc412s1sdny4yn9zjvzpb-source.drv
  /nix/store/c4382w1l4g752axvc8xmhx832xjxrmfd-agent-browser-dashboard-0.39.4.drv
  /nix/store/g34pbvsar9gsxbqrfa8kkds2nj2bad67-agent-browser-0.39.4-vendor-staging.drv
  /nix/store/dfdr0lixph2mfbvlrxqmw7q6vxxkw0ir-agent-browser-0.39.4-vendor.drv
  /nix/store/hyvyr01vi4lca6v2xi5d0i7yrrcvk2vk-agent-browser-0.39.4.drv
  /nix/store/nnbwjjv768pqg0xrxagdkgd964cjdp29-check-agent-browser.drv