Trouble using 'pyttsx3' and 'espeak' although both are installed

Question

I get

OSError: libespeak.so.1: cannot open shared object file: No such file or directory

However when I run $ espeak --version I get

eSpeak text-to-speech: 1.48.03 04.Mar.14 Data at: /nix/store/qyph6rmna5cjvr775qmlal2qy2d4n1i4-espeak-1.48.04/share/espeak-data

Also when I run espeak 'testing espeak in ubuntu' I get ALSA Libs errors

However installing alsa-lib doesn't fix it