cargo rustc --release --features "datagen" -- -C target-cpu=native --emit link=Anura-B915D509
 Downloading crates ...
warning: spurious network error (3 tries remaining): [28] Timeout was reached (failed to download any data for `libc v0.2.174` within 30s)
warning: spurious network error (2 tries remaining): [28] Timeout was reached (failed to download any data for `libc v0.2.174` within 30s)
warning: spurious network error (1 tries remaining): [28] Timeout was reached (failed to download any data for `libc v0.2.174` within 30s)
error: failed to download from `https://static.crates.io/crates/libc/0.2.174/download`

Caused by:
  [28] Timeout was reached (failed to download any data for `libc v0.2.174` within 30s)
make: *** [makefile:14: all] Error 101