[nix-shell:~/Downloads/zig/build]$ cat test.zig
const std = @import("std");

export fn foo(arg: [10]c_int) void {}

[nix-shell:~/Downloads/zig/build]$ ./zig build-obj test.zig
./test.zig:3:20: error: parameter of type '[10]c_int' not allowed in function with calling convention 'C'
export fn foo(arg: [10]c_int) void {}
                   ^