configure.ac does: AC_PATH_PROG([QUOTACHECK], [quotacheck], [/usr/sbin/quotacheck]) yet src/quotacheck/quotacheck.c does: static const char * const cmdline[] = { "/sbin/quotacheck", "-anug", NULL }; So it not only does not respect the autodetection but also uses a path different than the default one.
Fixed in git.
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