This gives
linux-vdso.so.1 => (0x00007ffdd33b8000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f7ce24c5000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f7ce2143000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f7ce1f2c000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f7ce1d0f000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f7ce1946000)
/lib64/ld-linux-x86-64.so.2 (0x000055e56299f000)
I can't see a mention of libxml there. How can I add it and is there a reason it wasn't linked with pip?