added package and linux deps

src/sudo.c

@@ -2,8 +2,11 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-// #include <sys/types.h>
+#include <sys/types.h>
 #include <unistd.h>
+#ifdef __linux__
+#include <grp.h>
+#endif
 
 void die(char *argv0, char *obj, char *msg) {
     if (msg == NULL) msg = strerror(errno);