Looks like a probable oversight, but when the WTF_PLATFORM to WTF_OS changes rolled out, NetBSD got left out. This will have a patch attached momentarily.
Created attachment 70718 [details] One line fix + changelog
Comment on attachment 70718 [details] One line fix + changelog Clearing flags on attachment: 70718 Committed r69753: <http://trac.webkit.org/changeset/69753>
All reviewed patches have been landed. Closing bug.