Bootchart2-git: bootchart-renderer fails to mount /lib/bootchart/tmpfs

Question

I recently bought a new laptop and made a fresh Arch installation. After a few initial annoyances I got everything working more or less as intended, except bootchart. Since the wiki said "Note: An alternative to Bootchart is bootchart2, which at least has more recent activity than 2005. It can be found on the AUR as bootchart2-git. It uses python for generating the final chart instead of a JVM. ", I used the git version from AUR, if that matters.
[r-a@vinter ~]$ /sbin/bootchartd start; sleep 1; /sbin/bootchartd stop
10834 109
bootchart-collector tmpfs mount to /lib/bootchart/tmpfs failed
Can't extract boot chart from collector
[r-a@vinter ~]$
A peek at the source code(collector/collector.c:625-630):
if (mount ("none", TMPFS_PATH, "tmpfs", MS_NOEXEC|MS_NOSUID, NULL) < 0) {
if (errno != EBUSY) {
fprintf (stderr, "bootchart-collector tmpfs mount to " TMPFS_PATH " failed\n");
return 1;
strace output:
15146 mount("none", "/lib/bootchart/tmpfs", "tmpfs", MS_NOSUID|MS_NOEXEC, NULL) = -1 EPERM (Operation not permitted)
man 2 mount says this:
EPERM  The caller does not have the required privileges.
I haven't tried changing the default path to mount to for example something like /tmp/, perhaps it'd solve the privilege issue... What bugs me is that the default config indeed uses /lib/bootchart/ as it's base path... So I can only assume that it somehow should have permission to mount tmpfs to that directory? Whatever, I am a bit clueless here. What next?

Answer 1

Setting the SUID bit of bootchart-collector with chmod +s didn't do the trick; though I am not entirely sure if it was because of failed mount - I can't check it right now.
...anyone...?