=> Bootstrap dependency digest>=20010302: found digest-20160304
=> Fetching rust-1.26.2-x86_64-unknown-freebsd.tar.gz
=> Total size: 148405629 bytes
Certificate verification failed for /C=US/ST=Arizona/L=Scottsdale/O=Starfield Technologies, Inc./CN=Starfield Services Root Certificate Authority - G2
34374371912:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
fetch: http://static.rust-lang.org/dist/rust-1.26.2-x86_64-unknown-freebsd.tar.gz: Authentication error
fetch: Unable to fetch expected file rust-1.26.2-x86_64-unknown-freebsd.tar.gz
fetch: http://cdn.NetBSD.org/pub/pkgsrc/distfiles/rust-1.26.2-x86_64-unknown-freebsd.tar.gz: Not Found
fetch: Unable to fetch expected file rust-1.26.2-x86_64-unknown-freebsd.tar.gz
fetch: http://ftp6.NetBSD.org/pub/pkgsrc/distfiles/rust-1.26.2-x86_64-unknown-freebsd.tar.gz: Not Found
fetch: Unable to fetch expected file rust-1.26.2-x86_64-unknown-freebsd.tar.gz
fetch: http://ftp.fr.NetBSD.org/pub/pkgsrc/distfiles/rust-1.26.2-x86_64-unknown-freebsd.tar.gz: Not Found
fetch: Unable to fetch expected file rust-1.26.2-x86_64-unknown-freebsd.tar.gz
fetch: http://ftp.NetBSD.org/pub/pkgsrc/distfiles/rust-1.26.2-x86_64-unknown-freebsd.tar.gz: Not Found
fetch: Unable to fetch expected file rust-1.26.2-x86_64-unknown-freebsd.tar.gz
*** Error code 1

Stop.
bmake: stopped in /usr/pkgsrc/lang/rust