couchdb has broken dependencies in the F-21 tree: On x86_64: couchdb-1.6.0-9.fc21.x86_64 requires erlang(erl_nif_version) = 0:2.4 couchdb-1.6.0-9.fc21.x86_64 requires erlang(erl_drv_version) = 0:2.2 On i386: couchdb-1.6.0-9.fc21.i686 requires erlang(erl_nif_version) = 0:2.4 couchdb-1.6.0-9.fc21.i686 requires erlang(erl_drv_version) = 0:2.2 On armhfp: couchdb-1.6.0-9.fc21.armv7hl requires erlang(erl_nif_version) = 0:2.4 couchdb-1.6.0-9.fc21.armv7hl requires erlang(erl_drv_version) = 0:2.2 Please resolve this as soon as possible.