Julia could not load dynamic library error when called from Python

I have some Python code calling a Julia function via PythonCall.jl. The Julia function is defined in a module that uses several Julia packages and Pango.jl is a dependency. The line

import rasterio

in the Python code trigger this error:

vagrant@vagrant:/vagrant$ LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/vagrant/julia-1.6.1/lib/julia" python3 run_test.py 
Traceback (most recent call last):
  File "run_test.py", line 13, in <module>
    import module_mi as mi
  File "/vagrant/module_mi.py", line 17, in <module>
    jl.seval("using MutualInformation")
juliacall.Error: InitError: could not load library "/home/vagrant/.julia/artifacts/783bdcb1f64473a5b79a2bca8920a3a271c4d81a/lib/libpangocairo-1.0.so"
/home/vagrant/.julia/artifacts/783bdcb1f64473a5b79a2bca8920a3a271c4d81a/lib/libpangoft2-1.0.so.0: undefined symbol: FcWeightFromOpenTypeDouble
during initialization of module Pango_jll

Notice that I need to prepend LD_LIBRARY_PATH="$LD_LIBRARY_PATH:/vagrant/julia-1.6.1/lib/Julia" to the python3 invocation so that Julia fill find the DLLs it needs. When I do not import rasterio there is no error. There is clearly some interaction between rasterio and Julia. Any ideas about how to debug this?