Use a combined cache derivation by default

README.md

@@ -14,9 +14,6 @@ zero-install).
 - A default install-phase that creates executables for you based on `"bin"` in
   your `package.json`, making your package readily installable.
 
-- Granular fetching of dependencies in Nix, speeding up rebuilds and
-  potentially allowing downloads to be shared between projects.
-
 - Preloading of your Yarn cache into the Nix store, speeding up local
   `nix-build`.
 
@@ -131,6 +128,10 @@ Some additional settings are available in `.yarnrc.yml`:
   Preloading does mean another copy of dependencies on disk, even if you don't
   do local Nix builds, but the size is usually not an issue on modern disks.
 
+- `individualNixPackaging` can be set to `true` to create a derivation per
+  dependency. This is useful in some cases, but can significantly slow down
+  builds if cache is cold and preloading is not possible.
+
 - `isolatedNixBuilds`, see [ISOLATED_BUILDS.md](./ISOLATED_BUILDS.md).
 
 - `installNixBinariesForDependencies` can be set to also install executables