these 4 derivations will be built:
  /nix/store/c4s6nd1bdm45h66chzsh7k8llb56rph4-iets-0.1.0.drv
  /nix/store/x0300whkphlgzd1kvhdk4kdr49vwnrdg-iets-fuzz-diff-0.0.0.drv
  /nix/store/qpglwqyskg1ddfz1ffi2lih9w3g6084f-iets-conformance-adapter.drv
  /nix/store/7d3wlkvdcq3msz6s1ms22d9fvzvbxqq6-nix-conformance-iets.drv
building '/nix/store/qpglwqyskg1ddfz1ffi2lih9w3g6084f-iets-conformance-adapter.drv'
iets-conformance-adapter> structuredAttrs is enabled
building '/nix/store/7d3wlkvdcq3msz6s1ms22d9fvzvbxqq6-nix-conformance-iets.drv'