catkin_make_isolated raises Keyboard Error

[tkruse]

Run steps detailed in #319, except with catkin_mak_isolated in the end:

mkdir issue_ws
cd issue_ws
mkdir src
cd src
git clone https://github.com/ros-visualization/rqt.git
wget https://github.com/ros-gbp/rqt-release/archive/release/rqt_gui_cpp/0.2.8.tar.gz
tar -xvf 0.2.8.tar.gz 
mv rqt-release-release-rqt_gui_cpp-0.2.8/ rqt_gui_cpp
git clone https://github.com/ros/catkin.git
cd ..
src/catkin/bin/catkin_make_isolaed

yields:

CMake Error at /tmp/issue_ws/devel_isolated/catkin/share/catkin/cmake/catkinConfig.cmake:71 (find_package):
  Could not find a configuration file for package qt_gui.

  Set qt_gui_DIR to the directory containing a CMake configuration file for
  qt_gui.  The file will have one of the following names:

    qt_guiConfig.cmake
    qt_gui-config.cmake

Call Stack (most recent call first):
  CMakeLists.txt:4 (find_package)


-- Configuring incomplete, errors occurred!

<== Failed to process package 'rqt_gui': 
  KeyboardInterrupt
Command failed, exiting.

Notice in the second-last line: "KeyboardInterrupt"