Numenta build fail generate build file

Pohsuans-MacBook-Pro:script pohsuanhuang$ cmake $NUPIC_CORE -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=../release -DPY_EXTENSIONS_DIR=$NUPIC_CORE/bindings/py/nupic/bindings -DCMAKE_CXX_COMPILER=/usr/bin/clang++
Doing a local build
-- CMAKE BITNESS=64
-- CMAKE MEMORY=1588
-- CapnProto CXX_FLAGS=   -fdiagnostics-show-option -m64 -fPIC -Wno-deprecated-register  -Wno-unused-variable -Wno-unused-parameter -Wno-incompatible-pointer-types -Wno-deprecated-declarations   -stdlib=libc++ -std=c++11  -DHAVE_UNISTD_H
-- CMAKE Found python interpreter /opt/local/bin/python2.7 version=%{PYTHON_VERSION_STRING}
-- PYTHON_EXECUTABLE   = /opt/local/bin/python2.7
-- PYTHON_INCLUDE_DIRS = /System/Library/Frameworks/Python.framework/Headers
-- PYTHON_LIBRARIES    = /usr/lib/libpython2.7.dylib
-- CAPNP_EXECUTABLE          = /Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script/ThirdParty/Install/bin/capnp
-- CAPNP_CMAKE_DEFINITIONS   = -DCAPNP_LITE=0
-- CAPNP_INCLUDE_DIRS        = /Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script/ThirdParty/Install/include
-- CAPNP_LINK_LIBRARIES      = /Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script/ThirdParty/Install/lib/libcapnpc.a;/Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script/ThirdParty/Install/lib/libcapnp.a;/Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script/ThirdParty/Install/lib/libkj.a
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named capnp
-- src_pycapnp_include_dir      =
-- Configuring done
You have changed variables that require your cache to be deleted.
Configure will be re-run and you may have to reset some variables.
The following variables have changed:
CMAKE_CXX_COMPILER= /usr/bin/clang++
CMAKE_CXX_COMPILER= /usr/bin/clang++
CMAKE_CXX_COMPILER= /usr/bin/clang++

-- The CXX compiler identification is AppleClang 7.3.0.7030029
-- Check for working CXX compiler: /usr/bin/clang++
-- Check for working CXX compiler: /usr/bin/clang++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
Doing a local build
-- CMAKE BITNESS=64
-- CMAKE MEMORY=1575
-- Performing Test compiler_supports_machine_option
-- Performing Test compiler_supports_machine_option - Success
-- CapnProto CXX_FLAGS=   -fdiagnostics-show-option -m64 -fPIC -Wno-deprecated-register  -Wno-unused-variable -Wno-unused-parameter -Wno-incompatible-pointer-types -Wno-deprecated-declarations   -stdlib=libc++ -std=c++11  -DHAVE_UNISTD_H
-- Found PythonInterp: /opt/local/bin/python2.7 (found suitable version "2.7.10", minimum required is "2.7")
-- CMAKE Found python interpreter /opt/local/bin/python2.7 version=%{PYTHON_VERSION_STRING}
-- Found PythonLibs: /usr/lib/libpython2.7.dylib (found version "2.7.10")
-- PYTHON_EXECUTABLE   = /opt/local/bin/python2.7
-- PYTHON_INCLUDE_DIRS = /System/Library/Frameworks/Python.framework/Headers
-- PYTHON_LIBRARIES    = /usr/lib/libpython2.7.dylib
-- CAPNP_EXECUTABLE          = /Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script/ThirdParty/Install/bin/capnp
-- CAPNP_CMAKE_DEFINITIONS   = -DCAPNP_LITE=0
-- CAPNP_INCLUDE_DIRS        = /Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script/ThirdParty/Install/include
-- CAPNP_LINK_LIBRARIES      = /Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script/ThirdParty/Install/lib/libcapnpc.a;/Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script/ThirdParty/Install/lib/libcapnp.a;/Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script/ThirdParty/Install/lib/libkj.a
Traceback (most recent call last):
  File "<string>", line 1, in <module>
ImportError: No module named capnp
-- src_pycapnp_include_dir      =
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/pohsuanhuang/miniconda/envs/nupic/project/nupic.core/build/script