Yes, they are identical whether or not KDE4/Qt4 is installed. What I use for the Debian builds is: --prefix=/opt/trinity --includedir=/opt/trinity/include/kde --mandir=/opt/trinity/share/man --infodir=/opt/trinity/share/info --with-extra-libs=/opt/trinity/lib --sysconfdir=/etc --localstatedir=/var --libexecdir="\${prefix}/lib/kdebase-kde3" --disable-rpath --with-xinerama --enable-closure (when needed, which is most of the time) There may be one or two that are module specific that I did not mention here, but this should permit close compatibility with the Debian builds. Tim