mdadm 4.1 doesn't seem to be in any mirror.

• **
• *mdadm-4.1.tar.xz BLAKE2B SHA512 size ...                                                                                                           *[* *ok* *]

>>> Downloading 'https://fastpull-us.funtoo.org/distfiles/mdadm_4.1~rc1-4.debian.tar.xz'

-2019-04-15 23:15:30-  https://fastpull-us.funtoo.org/distfiles/mdadm_4.1~rc1-4.debian.tar.xz

Resolving fastpull-us.funtoo.org... 192.150.253.88

Connecting to fastpull-us.funtoo.org|192.150.253.88|:443... connected.

HTTP request sent, awaiting response... 502 Bad Gateway

2019-04-15 23:15:31 ERROR 502: Bad Gateway.

>>> Downloading 'http://ftp.si.debian.org/debian/pool/main/m/mdadm/mdadm_4.1~rc1-4.debian.tar.xz'

-2019-04-15 23:15:31-  http://ftp.si.debian.org/debian/pool/main/m/mdadm/mdadm_4.1~rc1-4.debian.tar.xz

Resolving ftp.si.debian.org... 213.129.232.18, 2001:858:2:1::10

Connecting to ftp.si.debian.org|213.129.232.18|:80... connected.

HTTP request sent, awaiting response... 404 Not Found

2019-04-15 23:15:31 ERROR 404: Not Found.