Yeah it pulls some of the packages from cachix. Just not the kernel.

that’s normal

Thanks. This is valuable information for my future attempts at proper binary caches

No, I know what .drv means. Its there because i copied a line from the terminal. I tried rebuilding with the exact same, clean git tree and it still did not pull from cachix.

I am guessing there is probably some things in the kernel that depend of build date but I didn’t confirm my hypothesis by diffing .drv files. Instead I just used nixos-generators to build a raw disk image on fedora and flashed it with dd

It works