Sorry that this didn’t work for you! Did you run
sudo make install;
sudo ldconfig;
after it built? You’ll also need to forcefully rebuild your node modules:
rm -rf node_modules ~/.electron-gyp ~/.npm/_libvips ~/.node-gyp ~/.cache/yarn/*/*sharp*
./start.sh
Note that I’ve rewritten the entire HEIF/HEIC support pipeline in v1.0, so this pain and suffering should go away: