[Fsug-tvm] Problem faced while installing matrix-synapse server in postgres setup step

I am installing matrix synapse server from source in Debian 10. installing synapse from source was done as in https://github.com/matrix-org/synapse/blob/master/INSTALL.md#installing-from... Next I went on to install the postgres. https://github.com/matrix-org/synapse/blob/master/docs/postgres.md

When I ran the command ~/synapse/env/bin/pip install "matrix-synapse[postgres]" I get the error message as specified in the file attached.

How can I move further after fixing this error. Please help.

with Thanks & Regards

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