don't install qtX-default

debian/control.in

@@ -1,7 +1,7 @@
 Source: @PACKAGE_NAME@
 Priority: extra
 Maintainer: @AUTHOR@
-Build-Depends: debhelper (>= 7), pkg-config, autotools-dev, doxygen, graphviz, lsb-release, libssl-dev, libpkcs11-helper1-dev | libp11-kit-dev | libgnutls-dev, libpcsclite-dev, mrw-c++-dev, libproxy-dev, qtbase5-dev | libqt4-dev, qtbase5-dev-tools | qt4-dev-tools, qt5-default | qt4-default
+Build-Depends: debhelper (>= 7), pkg-config, autotools-dev, doxygen, graphviz, lsb-release, libssl-dev, libpkcs11-helper1-dev | libp11-kit-dev | libgnutls-dev, libpcsclite-dev, mrw-c++-dev, libproxy-dev, qtbase5-dev | libqt4-dev, qtbase5-dev-tools | qt4-dev-tools
 Standards-Version: 3.8.1
 Section: libs
 Homepage: https://dev.marc.waeckerlin.org/projects/libpcscxx