[INFO] crate cfg-if 0.1.7 is already in cache
[INFO] extracting crate cfg-if 0.1.7 into work/ex/pr-60620/sources/master#ef01f29964df207f181bd5bcf236e41372a17273/reg/cfg-if/0.1.7
[ERROR] No such file or directory (os error 2)
[INFO] retrying in 10ms
[ERROR] No such file or directory (os error 2)
[INFO] retrying in 20ms
[ERROR] this task or one of its parent failed!
[ERROR] unable to download cfg-if version 0.1.7
[ERROR] caused by: failed to fill whole buffer
[ERROR]