Error when building in a venv with PR 454

Err.log

[DEBUG   ] ar rcs libpython3.8.a Modules/getbuildinfo.o Parser/acceler.o Parser/grammar1.o Parser/listnode.o Parser/node.o Parser/parser.o Parser/token.o  Parser/myreadline.o Parser/parsetok.o Parser/tokenizer.o Objects/abstract.o Objects/accu.o Objects/boolobject.o Objects/bytes_methods.o Objects/bytearrayobject.o Objects/bytesobject.o Objects/call.o Objects/capsule.o Objects/cellobject.o Objects/classobject.o Objects/codeobject.o Objects/complexobject.o Objects/descrobject.o Objects/enumobject.o Objects/exceptions.o Objects/genobject.o Objects/fileobject.o Objects/floatobject.o Objects/frameobject.o Objects/funcobject.o Objects/interpreteridobject.o Objects/iterobject.o Objects/listobject.o Objects/longobject.o Objects/dictobject.o Objects/odictobject.o Objects/memoryobject.o Objects/methodobject.o Objects/moduleobject.o Objects/namespaceobject.o Objects/object.o Objects/obmalloc.o Objects/picklebufobject.o Objects/rangeobject.o Objects/setobject.o Objects/sliceobject.o Objects/structseq.o Objects/tupleobject.o Objects/typeobject.o Objects/unicodeobject.o Objects/unicodectype.o Objects/weakrefobject.o Python/_warnings.o Python/Python-ast.o Python/asdl.o Python/ast.o Python/ast_opt.o Python/ast_unparse.o Python/bltinmodule.o Python/ceval.o Python/codecs.o Python/compile.o Python/context.o Python/dynamic_annotations.o Python/errors.o Python/frozenmain.o Python/future.o Python/getargs.o Python/getcompiler.o Python/getcopyright.o Python/getplatform.o Python/getversion.o Python/graminit.o Python/hamt.o Python/import.o Python/importdl.o Python/initconfig.o Python/marshal.o Python/modsupport.o Python/mysnprintf.o Python/mystrtoul.o Python/pathconfig.o Python/peephole.o Python/preconfig.o Python/pyarena.o Python/pyctype.o Python/pyfpe.o Python/pyhash.o Python/pylifecycle.o Python/pymath.o Python/pystate.o Python/pythonrun.o Python/pytime.o Python/bootstrap_hash.o Python/structmember.o Python/symtable.o Python/sysmodule.o Python/thread.o Python/traceback.o Python/getopt.o Python/pystrcmp.o Python/pystrtod.o Python/pystrhex.o Python/dtoa.o Python/formatter_unicode.o Python/fileutils.o Python/dynload_shlib.o    Modules/config.o Modules/getpath.o Modules/main.o Modules/gcmodule.o Modules/zlibmodule.o  Modules/posixmodule.o  Modules/errnomodule.o  Modules/pwdmodule.o  Modules/_sre.o  Modules/_codecsmodule.o  Modules/_weakref.o  Modules/_functoolsmodule.o  Modules/_operator.o  Modules/_collectionsmodule.o  Modules/_abc.o  Modules/itertoolsmodule.o  Modules/atexitmodule.o  Modules/signalmodule.o  Modules/_stat.o  Modules/timemodule.o  Modules/_threadmodule.o  Modules/_localemodule.o  Modules/_iomodule.o Modules/iobase.o Modules/fileio.o Modules/bytesio.o Modules/bufferedio.o Modules/textio.o Modules/stringio.o  Modules/faulthandler.o  Modules/_tracemalloc.o Modules/hashtable.o  Modules/symtablemodule.o  Modules/xxsubtype.o Python/frozen.o
[DEBUG   ] /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.8.a(dynamic_annotations.o) has no symbols
[DEBUG   ] /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.8.a(pymath.o) has no symbols
[DEBUG   ] clang -Qunused-arguments -fcolor-diagnostics -lsqlite3 -lffi -L/Users/richard/Repos/kivy/kivy-ios/dist/hostlibffi/usr/local/lib -lsqlite3 -lffi -L/Users/richard/Repos/kivy/kivy-ios/dist/hostlibffi/usr/local/lib   -Wl,-stack_size,1000000  -framework CoreFoundation -o python.exe Programs/python.o libpython3.8.a -ldl   -framework CoreFoundation -lz                         
[DEBUG   ] clang -Qunused-arguments -fcolor-diagnostics -lsqlite3 -lffi -L/Users/richard/Repos/kivy/kivy-ios/dist/hostlibffi/usr/local/lib -lsqlite3 -lffi -L/Users/richard/Repos/kivy/kivy-ios/dist/hostlibffi/usr/local/lib   -Wl,-stack_size,1000000  -framework CoreFoundation -o Programs/_testembed Programs/_testembed.o libpython3.8.a -ldl   -framework CoreFoundation -lz                         
[DEBUG   ] ./python.exe -E -S -m sysconfig --generate-posix-vars ;\
[DEBUG   ]      if test $? -ne 0 ; then \
[DEBUG   ]              echo "generate-posix-vars failed" ; \
[DEBUG   ]              rm -f ./pybuilddir.txt ; \
[DEBUG   ]              exit 1 ; \
[DEBUG   ]      fi
[DEBUG   ]  CC='clang -Qunused-arguments -fcolor-diagnostics' LDSHARED='clang -Qunused-arguments -fcolor-diagnostics -bundle -undefined dynamic_lookup -lsqlite3 -lffi -L/Users/richard/Repos/kivy/kivy-ios/dist/hostlibffi/usr/local/lib -lsqlite3 -lffi -L/Users/richard/Repos/kivy/kivy-ios/dist/hostlibffi/usr/local/lib  ' OPT='-DNDEBUG -g -fwrapv -O3 -Wall'         _TCLTK_INCLUDES='' _TCLTK_LIBS=''    ./python.exe -E ./setup.py  build
[DEBUG   ] running build
[DEBUG   ] running build_ext
[DEBUG   ] error: [Errno 2] No such file or directory: '/Users/richard/Repos/kivy/kivy-ios/dist/hostpython3/include/python3.8/pyconfig.h'
[DEBUG   ] make: *** [sharedmods] Error 1
Exception in thread background thread for pid 37024:
Traceback (most recent call last):
  File "/usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/threading.py", line 926, in _bootstrap_inner
    self.run()
  File "/usr/local/Cellar/python/3.7.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/threading.py", line 870, in run
    self._target(*self._args, **self._kwargs)
  File "/Users/richard/Repos/kivy/kivy-ios/venv/lib/python3.7/site-packages/sh.py", line 1540, in wrap
    fn(*args, **kwargs)
  File "/Users/richard/Repos/kivy/kivy-ios/venv/lib/python3.7/site-packages/sh.py", line 2459, in background_thread
    handle_exit_code(exit_code)
  File "/Users/richard/Repos/kivy/kivy-ios/venv/lib/python3.7/site-packages/sh.py", line 2157, in fn
    return self.command.handle_command_exit_code(exit_code)
  File "/Users/richard/Repos/kivy/kivy-ios/venv/lib/python3.7/site-packages/sh.py", line 815, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_2: 

  RAN: /usr/bin/make -C /Users/richard/Repos/kivy/kivy-ios/build/hostpython3/x86_64/Python-3.8.2 -j12

  STDOUT:
clang -Qunused-arguments -fcolor-diagnostics -c -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -arch x86_64 -mmacosx-version-min=10.12 -I/Users/richard/Repos/kivy/kivy-ios/dist/hostlibffi/usr/local/include --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -arch x86_64 -mmacosx-version-min=10.12 -I/Users/richard/Repos/kivy/kivy-ios/dist/hostlibffi/usr/local/include  -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration  -I./Include/internal  -I. -... (128805 more, please see e.stdout)

  STDERR:


Traceback (most recent call last):
  File "toolchain.py", line 1566, in <module>
    ToolchainCL()
  File "toolchain.py", line 1282, in __init__
    getattr(self, args.command)()
  File "toolchain.py", line 1323, in build
    build_recipes(args.recipe, ctx)
  File "toolchain.py", line 1159, in build_recipes
    recipe.execute()
  File "/Users/richard/Repos/kivy/kivy-ios/toolchain.py", line 729, in execute
    self.build_all()
  File "/Users/richard/Repos/kivy/kivy-ios/toolchain.py", line 84, in _cache_execution
    f(self, *args, **kwargs)
  File "/Users/richard/Repos/kivy/kivy-ios/toolchain.py", line 837, in build_all
    self.build(arch)
  File "/Users/richard/Repos/kivy/kivy-ios/toolchain.py", line 84, in _cache_execution
    f(self, *args, **kwargs)
  File "/Users/richard/Repos/kivy/kivy-ios/toolchain.py", line 811, in build
    self.build_arch(arch)
  File "/Users/richard/Repos/kivy/kivy-ios/toolchain.py", line 874, in build_arch
    getattr(self, build)()
  File "/Users/richard/Repos/kivy/kivy-ios/recipes/hostpython3/__init__.py", line 63, in build_x86_64
    _env=build_env)
  File "/Users/richard/Repos/kivy/kivy-ios/toolchain.py", line 67, in shprint
    for line in cmd:
  File "/Users/richard/Repos/kivy/kivy-ios/venv/lib/python3.7/site-packages/sh.py", line 863, in next
    self.wait()
  File "/Users/richard/Repos/kivy/kivy-ios/venv/lib/python3.7/site-packages/sh.py", line 792, in wait
    self.handle_command_exit_code(exit_code)
  File "/Users/richard/Repos/kivy/kivy-ios/venv/lib/python3.7/site-packages/sh.py", line 815, in handle_command_exit_code
    raise exc
sh.ErrorReturnCode_2: 

  RAN: /usr/bin/make -C /Users/richard/Repos/kivy/kivy-ios/build/hostpython3/x86_64/Python-3.8.2 -j12

  STDOUT:
clang -Qunused-arguments -fcolor-diagnostics -c -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -arch x86_64 -mmacosx-version-min=10.12 -I/Users/richard/Repos/kivy/kivy-ios/dist/hostlibffi/usr/local/include --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -arch x86_64 -mmacosx-version-min=10.12 -I/Users/richard/Repos/kivy/kivy-ios/dist/hostlibffi/usr/local/include  -std=c99 -Wextra -Wno-unused-result -Wno-unused-parameter -Wno-missing-field-initializers -Wstrict-prototypes -Werror=implicit-function-declaration  -I./Include/internal  -I. -... (128805 more, please see e.stdout)

  STDERR: