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Created attachment 949928 [details] proposed patch to fix the issue The problem is simply reproducible: dnf install @kde-desktop-environment The installation fails, specifying that the group does not exist. The problem is that when performing the install operation, dnf searches through comps and looks for group with the specified name. However, kde-desktop-environment is not a group, it's an environment. Therefore the installation fails. I attach a very rough patch that fixes the issue, hope that helps.
Thanks for help. I made pull request that refactors these commands so the code of "@..." and "group ... ..." uses the same code and works also for "dnf erase @...".
dnf-plugins-core-0.1.5-1.fc21,hawkey-0.5.3-2.fc21,dnf-0.6.4-1.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/dnf-plugins-core-0.1.5-1.fc21,hawkey-0.5.3-2.fc21,dnf-0.6.4-1.fc21
Package hawkey-0.5.3-2.fc21, dnf-plugins-core-0.1.5-1.fc21, dnf-0.6.4-1.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 hawkey-0.5.3-2.fc21 dnf-plugins-core-0.1.5-1.fc21 dnf-0.6.4-1.fc21' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-2139/dnf-plugins-core-0.1.5-1.fc21,hawkey-0.5.3-2.fc21,dnf-0.6.4-1.fc21 then log in and leave karma (feedback).
hawkey-0.5.3-2.fc21, dnf-plugins-core-0.1.5-1.fc21, dnf-0.6.4-1.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.