The garbage collector no longer blocks new builds, so the message
waiting for the big garbage collector lock...is a thing of the past.
Binary cache stores now have a setting
nix developnow has a flag
Lists can now be compared lexicographically using the
New built-in function:
builtins.groupBy, with the same functionality as Nixpkgs'
lib.groupBy, but faster.
nix replnow has a