Comment 6 for bug 1580981

...except that the fix is only the upstream one, not the similar change to our own mkspec.

To reproduce:

bzr branch lp:telegram-app
vi telegram-app/scope/scope.pro # remove the PKG_CONFIG_LIBDIR line as instructed

sudo chroot /var/lib/schroot/mount/click-ubuntu-sdk-15.04-armhf-ucca-1000-* # your directory here
# navigate to telegram-app
qt5-qmake-arm-linux-gnueabihf .

Result:
Project ERROR: libunity-scopes development package not found

Expected:
No error.

However, even adding the same lines that were added in upstream to our own usr/lib/arm-linux-gnueabihf/qt5/mkspecs/ubuntu-arm-gnueabihf-g++/qmake.conf inside the chroot, the error message is still there.