This morning I updated my windows 10 with
• Feature update to Windows 10 Enterprise, version 1703.
After that my policy that enables long paths stopped working ( I guess? ). I see it as enabled but when I try to compile some stuff that have long path tree my compile fails.
When I pull the files out from the long tree closer to the root it works.
I reverted my windows update to the previous version and now everything works as usual.