Since version 0.8 stoken can be linked against nettle. Please consider linking against it, as there very few programs linking against libtomcrypt, and the main application that requires stoken already links against nettle (via gnutls).
stoken-0.81-2.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/stoken-0.81-2.fc21
stoken-0.81-2.fc21 works
Package stoken-0.81-2.fc21: * should fix your issue, * was pushed to the Fedora 21 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing stoken-0.81-2.fc21' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-0648/stoken-0.81-2.fc21 then log in and leave karma (feedback).
stoken-0.81-2.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.