musl needs sys/types.h to get the caddr_t typedef.
---
plugins/ethernet.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/plugins/ethernet.c b/plugins/ethernet.c
index 4b265621..b0395c83 100644
--- a/plugins/ethernet.c
+++ b/plugins/ethernet.c
@@ -27,6 +27,7 @@
#include <net/if.h>
#include <string.h>
#include <sys/ioctl.h>
+#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
--
2.11.0