=> Bootstrap dependency digest>=20010302: found digest-20190127
=> Fetching isl-0.23.tar.xz
=> Total size: 1729656 bytes
ftp: Can't connect to `128.93.193.15:80': No route to host
ftp: Can't connect to `isl.gforge.inria.fr:http'
fetch: Unable to fetch expected file isl-0.23.tar.xz
ftp: Can't connect to `151.101.229.6:80': No route to host
ftp: Can't connect to `cdn.NetBSD.org:http'
fetch: Unable to fetch expected file isl-0.23.tar.xz
ftp: Can't connect to `2001:470:a085:999::21:80': No route to host
ftp: Can't connect to `ftp6.NetBSD.org:http'
fetch: Unable to fetch expected file isl-0.23.tar.xz
ftp: Can't connect to `132.227.74.11:80': No route to host
ftp: Can't connect to `ftp.fr.NetBSD.org:http'
fetch: Unable to fetch expected file isl-0.23.tar.xz
ftp: Can't connect to `199.233.217.201:80': No route to host
ftp: Can't connect to `ftp.NetBSD.org:http'
fetch: Unable to fetch expected file isl-0.23.tar.xz
*** Error code 1

Stop.
make: stopped in /amd/pkgsrc/CHROOT/P/pkgsrc/math/isl