If you are on the newest version of Linux Mint, you will need to "reactivate" some older software tools in order to compile CKB for your system. This is super easy, and I will do it with only minimal command line usage.
1. Download the CKB zip file using the instructions on the official github page https://github.com/ccMSC/ckb
2. Install some old developer tools using Synaptic Package Manager. These are:
3. Unzip the CKB zip file into a permanent location somewhere. I would put it in my home folder under ~/.ckb
4. The setup script ~/.ckb/ckb-fw2kb/quickinstall should work out-of-the box because you have all the developer tools it needs set up
Over time, this will get trickier and trickier. I hope someone decides to maintain this!