qmake -query output for QT_HOST_LIBS contains bamboo path

Install the latest Qt5.1.0 Opensource installer (build number 35). Add Qt into PATH and run qmake -query.
Error: QT_HOST_LIBS contains bamboo paths:

digia@sdk-mac:~/Qt5.1.0/5.1.0-beta1/clang_64/examples/widgets/mainwindows/dockwidgets$ qmake -query
QT_SYSROOT:
QT_INSTALL_PREFIX:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64
QT_INSTALL_ARCHDATA:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64
QT_INSTALL_DATA:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/
QT_INSTALL_DOCS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/doc
QT_INSTALL_HEADERS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/include
QT_INSTALL_LIBS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/lib
QT_INSTALL_LIBEXECS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/libexec
QT_INSTALL_BINS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/bin
QT_INSTALL_TESTS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/tests
QT_INSTALL_PLUGINS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/plugins
QT_INSTALL_IMPORTS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/imports
QT_INSTALL_QML:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/qml
QT_INSTALL_TRANSLATIONS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/translations
QT_INSTALL_CONFIGURATION:/Library/Preferences/Qt
QT_INSTALL_EXAMPLES:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/examples
QT_INSTALL_DEMOS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/examples
QT_HOST_PREFIX:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64
QT_HOST_DATA:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64
QT_HOST_BINS:/Users/digia/Qt5.1.0/5.1.0-beta1/clang_64/bin
QT_HOST_LIBS:/Users/bld.qt/bamboo-agent-home/xml-data/build-dir/DQTC-LGPLRELEASEBUILD510-OSX106/_____________________________PADDING_____________________________/lib
QMAKE_SPEC:macx-clang

--> tested with Mac and Linux 32-bit installer.