This installs and build fine.

CMakeLists.txt

@@ -13,7 +13,7 @@ endif()
 set(MOOSE_CORE_DIR "${CMAKE_SOURCE_DIR}/moose-core")
 set(MOOSE_CORE_BUILD_DIR ${CMAKE_BINARY_DIR}/_build_moose_core)
 set(MOOSE_CORE_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}")
-set(PACKAGING_SCRIPTS ${CMAKE_SOURCE_DIR}/packaging_scripts)
+set(DATA_DIR ${CMAKE_SOURCE_DIR}/data)
 
 include(ExternalProject)
 message("[INFO] Installtion directory is ${CMAKE_INSTALL_PREFIX}")
@@ -21,8 +21,8 @@ ExternalProject_Add( moose-core
     PREFIX ${CMAKE_CURRENT_BINARY_DIR}/__moose-core
     SOURCE_DIR ${MOOSE_CORE_DIR}
     # Extremely useful in packaging
-    BINARY_DIR ${MOOSE_CORE_BUILD_DIR}
-    CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${MOOSE_CORE_INSTALL_DIR}
+    #BINARY_DIR ${MOOSE_CORE_INSTALL_DIR}
+    CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
     TEST_BEFORE_INSTALL 1
     BUILD_IN_SOURCE 0
 ) 
@@ -35,7 +35,6 @@ add_custom_target(moose-gui ALL)
 add_custom_command(TARGET moose-gui
     POST_BUILD
     COMMAND ${CMAKE_COMMAND} -E copy_directory ${MOOSE_GUI_DIR} ${MOOSE_GUI_INSTALL_DIR}
-    COMMAND ${CMAKE_COMMAND} -E copy ${PACKAGING_SCRIPTS}/moosegui 
-    ${CMAKE_INSTALL_PREFIX}/bin
+    COMMAND ${CMAKE_COMMAND} -E copy ${DATA_DIR}/moosegui ${CMAKE_INSTALL_PREFIX}/bin/
     )