Error when "make xproj"

gistfile1.txt

Peters-MacBook-Pro:mapbox-gl-native peterliu$ make xproj
rm: /Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-universal: Permission denied
ln: /Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-universal/build-cpp11-libcpp-x86_64-macosx: Permission denied
{ 'target_defaults': { 'cflags': [],
                       'default_configuration': 'Release',
                       'defines': [],
                       'include_dirs': [],
                       'libraries': []},
  'variables': { 'boost_root': '/Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-x86_64-macosx',
                 'curl_cflags': [ '-DCURL_STATICLIB',
                                  '-I/Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-x86_64-macosx/include'],
                 'curl_libraries': [ '-L/Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-x86_64-macosx/lib',
                                     '-lcurl',
                                     '-lssl',
                                     '-lcrypto',
                                     '-lssl',
                                     '-lcrypto',
                                     '-lz'],
                 'glfw3_cflags': [ '-I/Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-x86_64-macosx/include'],
                 'glfw3_libraries': [ '-L/Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-x86_64-macosx/lib',
                                      '-lglfw3',
                                      '-framework Cocoa',
                                      '-framework OpenGL',
                                      '-framework IOKit',
                                      '-framework CoreFoundation',
                                      '-framework CoreVideo'],
                 'node': '/usr/local/bin/node',
                 'npm': '/usr/local/bin/npm',
                 'png_cflags': [ '-I/Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-x86_64-macosx/include/libpng16'],
                 'png_libraries': [ '-L/Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-x86_64-macosx/lib',
                                    '-lpng16',
                                    '-lz'],
                 'python': '/usr/bin/python',
                 'uv_cflags': [ '-I/Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-x86_64-macosx/include'],
                 'uv_libraries': [ '-L/Users/peterliu/Repos/mapbox-gl-native/mapnik-packaging/osx/out/build-cpp11-libcpp-x86_64-macosx/lib',
                                   '-luv',
                                   '-lpthread',
                                   '-ldl']}}
creating  ./config.gypi
Traceback (most recent call last):
  File "./configure", line 135, in <module>
    pprint.pformat(output, indent=2) + "\n")
  File "./configure", line 113, in write
    f = open(filename, 'w+')
IOError: [Errno 13] Permission denied: './config.gypi'
make: *** [xlibs] Error 1