=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Fetching zircon-1.18.256.tar.gz
=> Total size: 315505 bytes
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curl: (56) response reading failed
fetch: Unable to fetch expected file zircon-1.18.256.tar.gz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0  308k    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100  308k  100  308k    0     0  1136k      0 --:--:-- --:--:-- --:--:-- 1132k
=> Checksum SHA1 OK for zircon-1.18.256.tar.gz
=> Checksum RMD160 OK for zircon-1.18.256.tar.gz
=> Checksum SHA512 OK for zircon-1.18.256.tar.gz