=> Bootstrap dependency digest>=20010302: found digest-20160304
=> Fetching uftp-4.1.2.tar
=> Total size: 1198080 bytes
Certificate verification failed for /C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
34374371912:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
fetch: http://sourceforge.net/projects/uftp-multicast/files/source-tar/uftp-4.1.2.tar: Authentication error
fetch: Unable to fetch expected file uftp-4.1.2.tar
uftp-4.1.2.tar                                           0  B    0  Bps
=> Checksum SHA1 OK for uftp-4.1.2.tar
=> Checksum RMD160 OK for uftp-4.1.2.tar
=> Checksum SHA512 OK for uftp-4.1.2.tar