When running - as suggested - `slaptest -f slapd.conf $TMPDIR` I get the
following result:
[root@ldap:/tmp/tmp.De46ABIbFf]# slaptest -f /nix/store/lks3ihydj40ff6yqvz0k33ycrc9vbyry-slapd.conf $TMPDIR
usage: slaptest [-v] [-d debuglevel] [-f configfile] [-F configdir] [-o <name>[=<value>]] [-n databasenumber] [-u] [-Q]
[root@ldap:/tmp/tmp.De46ABIbFf]# echo $?
1
Adding a `-F` option fixes the issue.
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