···162163## Nixpkgs internals {#sec-release-23.11-nixpkgs-internals}
16400165- The `qemu-vm.nix` module by default now identifies block devices via
166 persistent names available in `/dev/disk/by-*`. Because the rootDevice is
167 identfied by its filesystem label, it needs to be formatted before the VM is
···162163## Nixpkgs internals {#sec-release-23.11-nixpkgs-internals}
164165+- The use of `sourceRoot = "source";`, `sourceRoot = "source/subdir";`, and similar lines in package derivations using the default `unpackPhase` is deprecated as it requires `unpackPhase` to always produce a directory named "source". Use `sourceRoot = src.name`, `sourceRoot = "${src.name}/subdir";`, or `setSourceRoot = "sourceRoot=$(echo */subdir)";` or similar instead.
166+167- The `qemu-vm.nix` module by default now identifies block devices via
168 persistent names available in `/dev/disk/by-*`. Because the rootDevice is
169 identfied by its filesystem label, it needs to be formatted before the VM is