Partial build log
this derivation will be built:
/nix/store/qqr5dd1sx91rh4mlsdqvggqk1aqixmqn-clang5-support.patch.drv
building '/nix/store/ihxfbv3d1c6niyh6n67abh498nsszl14-clang5-support.patch.drv'...
clang5-support.patch> trying https://git.sagemath.org/sage.git/plain/build/pkgs/ppl/patches/clang5-support.patch?h=9.2
clang5-support.patch> % Total % Received % Xferd Average Speed Time Time Time Current
clang5-support.patch> Dload Upload Total Spent Left Speed
clang5-support.patch> 0 9115 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
clang5-support.patch> curl: (22) The requested URL returned error: 404
clang5-support.patch> error checking the existence of file:///dev/null/sha256/1zj90hm25pkgvk4jlkfzh18ak9b98217gbidl3731fdccbw6hr87:
clang5-support.patch> curl: (37) Couldn't open file /dev/null/sha256/1zj90hm25pkgvk4jlkfzh18ak9b98217gbidl3731fdccbw6hr87
clang5-support.patch> error: cannot download clang5-support.patch from any mirror
error: builder for '/nix/store/ihxfbv3d1c6niyh6n67abh498nsszl14-clang5-support.patch.drv' failed with exit code 1
error: