PyCUPS install issues on macOS Silicon

# Got ...
#
#ImportError: dlopen(/Users/erikvw/miniconda3/envs/edc-dev/lib/python3.9/site-packages/cups.cpython-39-darwin.so, 0x0002): Symbol not found: _libiconv
#  Referenced from: /Users/erikvw/miniconda3/envs/edc-dev/lib/python3.9/site-packages/cups.cpython-39-darwin.so
#  Expected in: /usr/lib/libiconv.2.dylib
#
# 
# Before building pycups ...

# install cups from brew

brew install cups

# add to .zshrc

export LDFLAGS="-L/opt/homebrew/opt/cups/lib"
export CPPFLAGS="-I/opt/homebrew/opt/cups/include"


# build a conda env using conda-forge channels

conda config --add channels conda-forge
conda config --set channel_priority strict
conda create -n edc python=3.9


# activate conda env

conda activate edc


# install pycups and make sure not using a cached build

pip install --upgrade --force-reinstall --no-cache-dir pycups