custom.bootstrap.less is autogenerated with errors

[grigio]

While Building the application:
client/styles/custom.bootstrap.less:609:22: Less compiler error: variable @link-hover-decoration is undefined

[grigio]

ok, I fixed it removing custom.bootstrap.import.less an adding back my changes.

Is there a better way to keep our custom changes and to be sure that custom.bootstrap.import.less will survive to the future updates?

// This File is for you to modify!
// It won't be overwritten as long as it exists.
// You may include this file into your less files to benefit from
// mixins and variables that bootstrap provides.

[Nemo64]

I actually have no idea. The best way would probably be to add variable overwrites into the json file and make the variables less generate from scratch with those overwrites.

[emgee3]

This happens when one updates and the underlying LESS variables change between versions. I haven't thought up a simple way to fix this, but probably documenting this fact would be a good idea as a start.