In this post I'm telling my journey which started with my blog post about using Github Action as my main CI provider - in case you missed it see here - on how to do a full yocto/poky build with just ~14GB of disk space Typically disk space is cheap nowadays and can be used without thinking too much about it - which leads to disk usage of 50GB and more for a yocto/poky build. So what are the options, when disk space becomes precious? Constraints, constraints, constraints While Github Actions is free for open source project (like mine) it is highly limited in regards of resources. Currently (2020/04/11) you get ( source ) 2-core CPU 7 GB of RAM memory 14 GB of SSD disk space maximum of 6 hours per pipeline that's not very much when you think about doing a poky/yocto build on that, so every byte actually counts. Constant pain As the involved layer are constantly growing one has to care about every byte that could be saved, without giving up the overall ai