Partial build log
this derivation will be built:
/nix/store/s1hvq0hlyfj3k8y257c9gi9bar20vflb-realpartloop.patch.drv
building '/nix/store/pgs0z20z49imgrk90hcafwzhrczq9ljr-realpartloop.patch.drv'...
realpartloop.patch> trying https://git.sagemath.org/sage.git/plain/build/pkgs/pynac/patches/realpartloop.patch?h=9.4.beta5
realpartloop.patch> % Total % Received % Xferd Average Speed Time Time Time Current
realpartloop.patch> Dload Upload Total Spent Left Speed
realpartloop.patch> 0 9115 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
realpartloop.patch> curl: (22) The requested URL returned error: 404
realpartloop.patch> error checking the existence of file:///dev/null/sha256/sha256-1nj0xtlFN5fZKEiRLD+tiW/ZtxMQre1ziEGA0OVUGE4=:
realpartloop.patch> curl: (37) Couldn't open file /dev/null/sha256/sha256-1nj0xtlFN5fZKEiRLD+tiW/ZtxMQre1ziEGA0OVUGE4=
realpartloop.patch> error: cannot download realpartloop.patch from any mirror
error: builder for '/nix/store/pgs0z20z49imgrk90hcafwzhrczq9ljr-realpartloop.patch.drv' failed with exit code 1
error: