Building cannot "ignore patches". A patch is a collection of changes to the source code, and you need to apply that before building. When the build runs it has no idea if anything was changed (svn is invoked to figure the revision number of your source tree, and it can also tell if the source tree was modified -- but not why and who modified it) and what changed it -- having a patch applied is basically the same as having modifications in the code you did yourself. If the patch did not apply (for whatever reason) it's not applied. Period.
There's still the possibility that recent changes in svn broke the patches you're talking about. As you (again -- sic) haven't mentioned which patches *exactly* you are talking about there is no way for others to check if that's actually your issue. In general, the 7z archive is identical to svn -- except that svn is newer, and, presuming you checked it out as working copy, does include some special files used by svn. Those special files, however, are not to be modified by the user, and have no impact on applying patches or building.
You may want to refine your question ... (as in: tell us *which* patches you are talking about, *how* did you grab the sources, and *how* did you apply the patches. And of course, *what* is the error message. Oh, and *which* daily build are you talking about?)
May I also point to one of the links in my signature

?