[INFO] crate epub-builder 0.4.3 is already in cache
[INFO] extracting crate epub-builder 0.4.3 into work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/reg/epub-builder/0.4.3
[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 epub-builder version 0.4.3
[ERROR] caused by: failed to fill whole buffer
[ERROR]