Cannot load libgobject-2.0.so when running on aws lambda

Hey, I am currently trying to deploy libvips+pyvips as an aws lambda layer, but I am currently unable to successfully package the libraries as it seems. I am building vips in a docker container by invoking

RUN ./autogen.sh --prefix /opt/vips \
  && make V=0 \
  && make install

Afterwards, I install pyvips like this:

RUN python3 -m pip install \
   -t /opt/python \
   --python-version "3.9" \
   --only-binary=:all: \
   pyvips

Finally, I zip the content of /opt, and upload it as a layer.

When invoking a function relying on pyvips, I get the following error:

[ERROR] OSError: cannot load library 'libgobject-2.0.so.0': libgobject-2.0.so.0: cannot open shared object file: No such file or directory.  Additionally, ctypes.util.find_library() did not manage to locate a library called 'libgobject-2.0.so.0'
Traceback (most recent call last):
  File "/var/task/serverless_sdk/__init__.py", line 144, in wrapped_handler
    return user_handler(event, context)
  File "/var/task/s_trigger.py", line 25, in error_handler
    raise e
  File "/var/task/s_trigger.py", line 20, in <module>
    user_handler = serverless_sdk.get_user_handler('handler.trigger')
  File "/var/task/serverless_sdk/__init__.py", line 56, in get_user_handler
    user_module = import_module(user_module_name)
  File "/var/lang/lib/python3.9/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "/var/task/handler.py", line 10, in <module>
    from conversion import convert_pdf_to_jpeg_on_s3
  File "/var/task/conversion.py", line 1, in <module>
    from pyvips import Image
  File "/opt/python/pyvips/__init__.py", line 53, in <module>
    gobject_lib = ffi.dlopen(_gobject_libname)
  File "/opt/python/cffi/api.py", line 150, in dlopen
    lib, function_cache = _make_ffi_library(self, name, flags)
  File "/opt/python/cffi/api.py", line 832, in _make_ffi_library
    backendlib = _load_backend_lib(backend, libname, flags)
  File "/opt/python/cffi/api.py", line 827, in _load_backend_lib
    raise OSError(msg)

I use python-serverless-requirements, but pyvips is not included in the requirements.txt file.

Do you know how I might be able to fix this problem?

[AntonOellerer]

You were correct, for some reason libgobject-2.0.so.0 exists in what I thought was the lambda image, but not in the lambda aws service, thank you!

[jcupitt]

Well, libgobject-2.0.so.0 at first, but there could be others missing too, of course.