5.6.0 and 5.4.2 install fine but 5.5.1 fails to install with these errors.

Error during installation process (qt.55.qtquick1.clang_64):
Could not find the needed QmakeOutputInstallerKey(qt.55.clang_64_qmakeoutput) value on the installer object. The ConsumeOutput operation on the valid qmake needs to be called first.

Error during installation process (qt.55.qtwebengine.clang_64):
Could not find the needed QmakeOutputInstallerKey(qt.55.clang_64_qmakeoutput) value on the installer object. The ConsumeOutput operation on the valid qmake needs to be called first.

Error during installation process (qt.55.qtlocation.clang_64):
Could not find the needed QmakeOutputInstallerKey(qt.55.clang_64_qmakeoutput) value on the installer object. The ConsumeOutput operation on the valid qmake needs to be called first.

Error during installation process (qt.55.qtscript.clang_64):
Could not find the needed QmakeOutputInstallerKey(qt.55.clang_64_qmakeoutput) value on the installer object. The ConsumeOutput operation on the valid qmake needs to be called first.

Error during installation process (qt.55.qtquickcontrols.clang_64):
Could not find the needed QmakeOutputInstallerKey(qt.55.clang_64_qmakeoutput) value on the installer object. The ConsumeOutput operation on the valid qmake needs to be called first.

Error during installation process (qt.55.qt3d.clang_64):
Could not find the needed QmakeOutputInstallerKey(qt.55.clang_64_qmakeoutput) value on the installer object. The ConsumeOutput operation on the valid qmake needs to be called first.

Error during installation process (qt.55.qtcanvas3d.clang_64):
Could not find the needed QmakeOutputInstallerKey(qt.55.clang_64_qmakeoutput) value on the installer object. The ConsumeOutput operation on the valid qmake needs to be called first.

Error during installation process (qt.extras.qtwebview.qt55.clang_64):
Could not find the needed QmakeOutputInstallerKey(qt.55.clang_64_qmakeoutput) value on the installer object. The ConsumeOutput operation on the valid qmake needs to be called first.