To be clear, the build fails when importlib needs to be frozen again:

$ touch Lib/importlib/_bootstrap.py 
$ make
make Modules/_freeze_importlib
make[1] : on entre dans le répertoire « /home/antoine/cpython/default »
gcc -pthread -c -Wno-unused-result -g -O0 -Wall -Wstrict-prototypes    -I. -I./Include    -DPy_BUILD_CORE -o Modules/_freeze_importlib.o Modules/_freeze_importlib.c
gcc -pthread   -o Modules/_freeze_importlib Modules/_freeze_importlib.o Modules/getbuildinfo.o Parser/acceler.o Parser/grammar1.o Parser/listnode.o Parser/node.o Parser/parser.o Parser/bitset.o Parser/metagrammar.o Parser/firstsets.o Parser/grammar.o Parser/pgen.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/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/iterobject.o Objects/listobject.o Objects/longobject.o Objects/dictobject.o Objects/memoryobject.o Objects/methodobject.o Objects/moduleobject.o Objects/namespaceobject.o Objects/object.o Objects/obmalloc.o Objects/capsule.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/bltinmodule.o Python/ceval.o Python/compile.o Python/codecs.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/import.o Python/importdl.o Python/marshal.o Python/modsupport.o Python/mystrtoul.o Python/mysnprintf.o Python/peephole.o Python/pyarena.o Python/pyctype.o Python/pyfpe.o Python/pymath.o Python/pystate.o Python/pythonrun.o Python/pytime.o Python/random.o Python/structmember.o Python/symtable.o Python/sysmodule.o Python/traceback.o Python/getopt.o Python/pystrcmp.o Python/pystrtod.o Python/dtoa.o Python/formatter_unicode.o Python/fileutils.o Python/dynload_shlib.o   Python/thread.o Modules/config.o Modules/getpath.o Modules/main.o Modules/gcmodule.o  Modules/_threadmodule.o  Modules/signalmodule.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/itertoolsmodule.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/zipimport.o  Modules/faulthandler.o  Modules/symtablemodule.o  Modules/xxsubtype.o -lpthread -ldl  -lutil   -lm  
Modules/_freeze_importlib.o: In function `main':
/home/antoine/cpython/default/Modules/_freeze_importlib.c:37: undefined reference to `PyImport_FrozenModules'
Python/import.o: In function `find_frozen':
/home/antoine/cpython/default/Python/import.c:978: undefined reference to `PyImport_FrozenModules'
collect2: ld a retourné 1 code d'état d'exécution
make[1]: *** [Modules/_freeze_importlib] Erreur 1
make[1] : on quitte le répertoire « /home/antoine/cpython/default »
make: *** [Python/importlib.h] Erreur 2