I was using Grunt to build my web app on my VPS. I use the “grunt-contrib-imagemin” package which minifies images. It all seemed to work fine in Nitrous whatsoever.

Turns out I get a weird error that says “‘GLIBC_2.15’ not found”. I looked in the npm log and it seems like the PNG package could have not been built, a library was missing.

To fix I ran this command:

sudo apt-get install libpng-dev