Partial build log
this derivation will be built:
/nix/store/ii69pz85qmm1lw5g3yw50ala17pxq66x-ucspi-tcp_0.88-3.diff.gz.drv
building '/nix/store/vxi7ziwpwxixah0506ysgkm1g0zyh3ma-ucspi-tcp_0.88-3.diff.gz.drv'...
ucspi-tcp_0.88> trying http://ftp.de.debian.org/debian/pool/main/u/ucspi-tcp/ucspi-tcp_0.88-3.diff.gz
ucspi-tcp_0.88> % Total % Received % Xferd Average Speed Time Time Time Current
ucspi-tcp_0.88> Dload Upload Total Spent Left Speed
ucspi-tcp_0.88> 0 279 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
ucspi-tcp_0.88> curl: (22) The requested URL returned error: 404
ucspi-tcp_0.88> error checking the existence of file:///dev/null/sha256/0mzmhz8hjkrs0khmkzs5i0s1kgmgaqz07h493bd5jj5fm5njxln6:
ucspi-tcp_0.88> curl: (37) Couldn't open file /dev/null/sha256/0mzmhz8hjkrs0khmkzs5i0s1kgmgaqz07h493bd5jj5fm5njxln6
ucspi-tcp_0.88> error: cannot download ucspi-tcp_0.88-3.diff.gz from any mirror
error: builder for '/nix/store/vxi7ziwpwxixah0506ysgkm1g0zyh3ma-ucspi-tcp_0.88-3.diff.gz.drv' failed with exit code 1
error: