Error running 'actool': No such file or directory

While compiling Qt Creator from inside Qt Creator + qbs plugin I get the following error:

linking libProjectExplorer_debug.dylib
compiling fakevim_test.cpp
compiling diffeditorfactory.cpp
compiling moc_diffview.cpp
compiling sidebysidediffeditorwidget.cpp
lrelease qtcreator_uk.ts
moc emacskeysplugin.h
/Users/alex/Dev/qtcreator/build-qtcreator-Qt_5_6_x_v2-Release/bin/Qt Creator.app/Contents/Resources/qbs/share/qbs/modules/ib/IBModule.qbs:191:26 Error while calling Rule.outputArtifacts: Error: Error running 'actool': No such file or directory
The following products could not be built for configuration qtc_Qt_5_6_x_38236a72-debug:
	Translations
	Qt Creator
	qtcjson
        .......
Error while building/deploying project qtcreator (kit: Qt 5.6.x)
When executing step "Qbs Build"

Looking into it a bit:

• actoolPath is just "actool"
• At top of IBModule.qbs there is a comment
  "Depends { name: "cpp" }

  // to put toolchainInstallPath in the PATH for actool"

• Checking toolchainInstallPath for my Qt 5.6 Kit in Qt Creator Preferences -> Qbs -> cpp -> toolchainInstallPath is equal just to = "/usr/bin"

• By looking into qbs config-ui there are 2 toolchain profiles:
  xcode-macosx-clang for which toolchainInstallPath is "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin"

and xcode-macosx-gcc for which toolchainInstallPath is "/Applications/Xcode.app/Contents/Developer/usr/bin"

A thing to note that actool is only present in the second directory.
> xcrun --find actool
/Applications/Xcode.app/Contents/Developer/usr/bin/actool