ncmpcpp failed

trying http://unkart.ovh.org/ncmpcpp/ncmpcpp-0.5.8.tar.bz2
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   256  100   256    0     0    935      0 --:--:-- --:--:-- --:--:--  2752
  0     0    0     0    0     0      0      0 --:--:--  0:00:02 --:--:--     0
curl: (22) The requested URL returned error: 404
error: cannot download ncmpcpp-0.5.8.tar.bz2 from any mirror
builder for `/nix/store/0lpc2sirh8zaap4ciy7nzry27xlv1q5w-ncmpcpp-0.5.8.tar.bz2.drv' failed with exit code 1
cannot build derivation `/nix/store/kqj5gjpp3vxbv51pvq0nzx4mwk4lv07s-ncmpcpp-0.5.8.drv': 1 dependencies couldn't be built
cannot build derivation `/nix/store/ni82g7xnmnj393ywrc7jzi9hscn63xrr-system-path.drv': 1 dependencies couldn't be built
cannot build derivation `/nix/store/xjgld1c899m8sz5zwbfpr41k7dvbbs2b-nixos-0.1pre3906_16713db-970a326.drv': 1 dependencies couldn't be built
error: build of `/nix/store/xjgld1c899m8sz5zwbfpr41k7dvbbs2b-nixos-0.1pre3906_16713db-970a326.drv' failed