the debhelper changelog for 8.9.1 states that * Now the QT4 version of qmake can be explicitly selected by passing --buildsystem=qmake_qt4. Closes: #566840
that bug was about adding qmake to debhelper, and already contained suggestions for the issue of choosing a version (they used --qmake=qmake-qt3), but the syntax described in the changelog entry was not mentioned there. i just tested the --buildsystem=qmake_qt4 parameter (in a backporting environment where build-conflicts was not an option for dependency reasons), and it solved the problems. therefore, i suggest that this bug report be closed.
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