Nimbus Sans Condensed being selected over Nimbus Sans

[fontconfig@xxxxxxxxxxxxxx (Frank Murphy)]

With KDE on Debian sid, all the "helvetica" fonts are grabbing Nimbus Sans, as 
expected. However, it is grabbing Nimbus Sans:style=Regular Condesed. I'd 
prefer Nimbus Sans:style=Regular if condensed isn't requested.

How do I specify this in .fonts.conf. <prefer> only sems to work with font 
familes, not styles.

Thanks,

Frank