Partial build log
this derivation will be built:
/nix/store/75mvrj7f726387bip5ik7pql24vb0cd3-flex-2-5-35.tar.gz.drv
building '/nix/store/d30xb1mrh9xvxkxy3diaibqh5kq99v57-flex-2-5-35.tar.gz.drv'...
flex> warning: archives from GitHub revisions should use fetchFromGitHub
flex> trying https://github.com/westes/flex/archive/flex-2-5-35.tar.gz
flex> % Total % Received % Xferd Average Speed Time Time Time Current
flex> Dload Upload Total Spent Left Speed
flex> 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
flex> 0 14 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0
flex> curl: (22) The requested URL returned error: 404
flex> error checking the existence of file:///dev/null/sha256/0wh06nix8bd4w1aq4k2fbbkdq5i30a9lxz3xczf3ff28yy0kfwzm:
flex> curl: (37) Couldn't open file /dev/null/sha256/0wh06nix8bd4w1aq4k2fbbkdq5i30a9lxz3xczf3ff28yy0kfwzm
flex> error: cannot download flex-2-5-35.tar.gz from any mirror
error: builder for '/nix/store/d30xb1mrh9xvxkxy3diaibqh5kq99v57-flex-2-5-35.tar.gz.drv' failed with exit code 1
error: