gistfile1.txt

$ nix-shell --pure -p zig glibc --run 'zig run main.zig'
/home/lars/tmp/foo/main.zig:2:11: error: C import failed
const c = @cImport(@cInclude("termios"));
          ^
/home/lars/tmp/foo/main.zig:2:11: note: libc headers not available; compilation does not link against libc
const c = @cImport(@cInclude("termios"));
          ^
/home/lars/.local/share/zig/stage1/o/XzhNJvQsO9t306oyg3q9n1dSgg77Kb5mp_EUe-JWYMXWtCcqWaACdv5tCO4OXJKV/cimport.h:1:10: note: 'termios' file not found
#include <termios>
         ^
/home/lars/tmp/foo/main.zig:6:23: error: container 'std.os' has no member called 'STDIN_FILENO'
    c.tcgetattr(std.os.STDIN_FILENO, &term);
                      ^

main.zig

const std = @import("std");
const c = @cImport(@cInclude("termios"));

pub fn main() void {
    var term: c.struct_termios = {};
    c.tcgetattr(std.os.STDIN_FILENO, &term);
}