can't run xdp_dump

[root@node01 xdp_dump]# go build
# github.com/dropbox/goebpf
In file included from ../../../map.go:13:0:
./bpf_helpers.h:957:15: error: expected declaration specifiers or '...' before 'sizeof'
static_assert(sizeof(__u8) == 1, "wrong_u8_size");
^
./bpf_helpers.h:957:34: error: expected declaration specifiers or '...' before string constant
static_assert(sizeof(__u8) == 1, "wrong_u8_size");
^
./bpf_helpers.h:958:15: error: expected declaration specifiers or '...' before 'sizeof'
static_assert(sizeof(__u16) == 2, "wrong_u16_size");
^
./bpf_helpers.h:958:35: error: expected declaration specifiers or '...' before string constant
static_assert(sizeof(__u16) == 2, "wrong_u16_size");
^
./bpf_helpers.h:959:15: error: expected declaration specifiers or '...' before 'sizeof'
static_assert(sizeof(__u32) == 4, "wrong_u32_size");
^
./bpf_helpers.h:959:35: error: expected declaration specifiers or '...' before string constant
static_assert(sizeof(__u32) == 4, "wrong_u32_size");
^
./bpf_helpers.h:960:15: error: expected declaration specifiers or '...' before 'sizeof'
static_assert(sizeof(__u64) == 8, "wrong_u64_size");
^
./bpf_helpers.h:960:35: error: expected declaration specifiers or '...' before string constant
static_assert(sizeof(__u64) == 8, "wrong_u64_size");
^
[root@node01 xdp_dump]#