these 3 derivations will be built:
  /nix/store/8hx2jb5m6ny1j5lzg2f165cvkjg2xf2q-iets-fuzzers-0.0.0.drv
  /nix/store/cznrgmd62aj35i1fbl732isa9nvf7d65-iets-fuzz-diff-0.0.0.drv
  /nix/store/qh13ii5nm4rfyha6qmqpkp3ibmz2xd44-iets-fuzz-drv-check.drv
could not copy /nix/store/kn32cacvx7mp688yrsmg8ccvn05l0l1f-iets-fuzzers-0.0.0: error: gRPC FetchNars failed: Stream removed (Socket closed)
error: some outputs are unexpectedly invalid