diff --git a/check-users.c b/check-users.c
index 4ded587..8444b65 100644
--- a/check-users.c
+++ b/check-users.c
@@ -21,7 +21,7 @@ void check_users() {
 	struct passwd *res;
 	errno = 0;
 	res = getpwnam(CHECK_USERS_CANARY_USER);
-	if(res == NULL) {
+	if(res == NULL || getenv("NEST_SANITY_CHECK_USERS_DEBUG")!=NULL) {
 		/* If we've already reported it, let's not report it again */
 		if(check_users_state == 1) return;
 		int res_errno;
@@ -37,6 +37,7 @@ void check_users() {
 		snprintf(notification_payload, notification_payload_len, notification_payload_fmt, res_err_txt, res_errno);
 		int send_alarm_result;
 		send_alarm_result = send_alarm(notification_payload);
+		free(notification_payload);
 		/* We only set this to 1 if we successfully reported the issue. */
 		if(send_alarm_result == 0) check_users_state = 1;
 	}
diff --git a/configure.ac b/configure.ac
index 429ca23..0077c8e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,11 +15,14 @@ PKG_PROG_PKG_CONFIG
 PKG_CHECK_MODULES([LIBCURL], [libcurl])
 
 # Checks for header files.
+AC_CHECK_HEADER_STDBOOL
+AC_CHECK_HEADERS([unistd.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 
 # Checks for library functions.
 AC_FUNC_MALLOC
+AC_CHECK_FUNCS([strerror])
 
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT
diff --git a/notify.c b/notify.c
index 5b9e8d4..af5e34d 100644
--- a/notify.c
+++ b/notify.c
@@ -56,8 +56,8 @@ const char *build_prefixed_report(const char *report) {
 	 * adds prefixes and calls the report send function */
 	int report_len = strlen(report);
 	int notification_prefix_len = strlen(NOTIFICATION_PREFIX);
-	int post_payload_len = report_len + notification_prefix_len + 1;
-	char *post_payload = malloc(post_payload_len);
+	int post_payload_len = report_len + notification_prefix_len;
+	char *post_payload = malloc(post_payload_len+1);
 	for(int a=0;a<notification_prefix_len;a++) {
 		post_payload[a] = NOTIFICATION_PREFIX[a];
 	}