How about remove this block and update the block:

<pre><code>#
# LibNupicCore
#
set(LIB_STATIC_NUPICCORE nupic_core)
generate_submodule_library(${LIB_STATIC_NUPICCORE} "${REPOSITORY_DIR}/nta" "-DNTA_PYTHON_SUPPORT=${PYTHON_VERSION}" "")</code></pre>

To this:

<pre><code>#
# LibNupicCore
#
<b>set(NUPIC_CORE_REMOTE "https://github.com/numenta/nupic.core.git" CACHE STRING "nupic.core remote repository")
set(NUPIC_CORE_COMMITISH "90df8f1ef9eabda03695a9aa60c8029fe3540b9e"CACHE STRING "nupic.core commit")
set(LIB_STATIC_NUPICCORE nupic_core)</b>
generate_submodule_library(${LIB_STATIC_NUPICCORE} "${REPOSITORY_DIR}/nta" "-DNTA_PYTHON_SUPPORT=${PYTHON_VERSION}" "" <b>"${NUPIC_CORE_REMOTE}" "${NUPIC_CORE_COMMITISH}"</b>)</code></pre>