[Haskell-beginners] cabal re-configure not recognized

When changing a cabal file, if one runs 'cabal build' immediately, a message states that you must re-configure. So I run 'cabal configure' and then again try 'cabal build', but I get the same message again. The problem goes away if I wait about a minute. So I suspect there is an issue with the file modification time being ahead of what cabal thinks the time is. Has anyone experienced this problem, and know what might be the fix? Thank you. The issue occurs only on my Ubuntu machine. I do not have this problem with the same code on Mac OS X.