Partial build log
this derivation will be built:
/nix/store/31glx3jkry22p642vbbd8rdqgc3y3i53-nofltk-check.patch.drv
building '/nix/store/2crnm00041ha9rh5wvzxm0vzxd3lbj7a-nofltk-check.patch.drv'...
nofltk-check.patch> trying https://git.sagemath.org/sage.git/plain/build/pkgs/giac/patches/nofltk-check.patch?id=7553a3c8dfa7bcec07241a07e6a4e7dcf5bb4f26
nofltk-check.patch> % Total % Received % Xferd Average Speed Time Time Time Current
nofltk-check.patch> Dload Upload Total Spent Left Speed
nofltk-check.patch> 0 9115 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
nofltk-check.patch> curl: (22) The requested URL returned error: 404
nofltk-check.patch> error checking the existence of file:///dev/null/sha256/sha256-nAl5q3ufLjK3X9s0qMlGNowdRRf3EaC24eVtJABzdXY=:
nofltk-check.patch> curl: (37) Couldn't open file /dev/null/sha256/sha256-nAl5q3ufLjK3X9s0qMlGNowdRRf3EaC24eVtJABzdXY=
nofltk-check.patch> error: cannot download nofltk-check.patch from any mirror
error: builder for '/nix/store/2crnm00041ha9rh5wvzxm0vzxd3lbj7a-nofltk-check.patch.drv' failed with exit code 1
error: