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# Release 22.11 (“Raccoon”, 2022.11/??) {#sec-release-22.11}
Support is planned until the end of June 2023, handing over to 23.05.
## Highlights {#sec-release-22.11-highlights}
In addition to numerous new and upgraded packages, this release has the following highlights:
- During cross-compilation, tests are now executed if the test suite can be executed
by the build platform. This is the case when doing “native” cross-compilation
where the build and host platforms are largely the same, but the nixpkgs' cross
compilation infrastructure is used, e.g. `pkgsStatic` and `pkgsLLVM`. Another
possibility is that the build platform is a superset of the host platform, e.g. when
cross-compiling from `x86_64-unknown-linux` to `i686-unknown-linux`.
The predicate gating test suite execution is the newly added `canExecute`
predicate: You can e.g. check if `stdenv.buildPlatform` can execute binaries
built for `stdenv.hostPlatform` (i.e. produced by `stdenv.cc`) by evaluating
`stdenv.buildPlatform.canExecute stdenv.hostPlatform`.
- PHP now defaults to PHP 8.1, updated from 8.0.
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## New Services {#sec-release-22.11-new-services}
- [appvm](https://github.com/jollheef/appvm), Nix based app VMs. Available as [virtualisation.appvm](options.html#opt-virtualisation.appvm.enable).
- [dragonflydb](https://dragonflydb.io/), a modern replacement for Redis and Memcached. Available as [services.dragonflydb](#opt-services.dragonflydb.enable).
- [infnoise](https://github.com/leetronics/infnoise), a hardware True Random Number Generator dongle.
Available as [services.infnoise](options.html#opt-services.infnoise.enable).
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## Backward Incompatibilities {#sec-release-22.11-incompatibilities}
- The `isCompatible` predicate checking CPU compatibility is no longer exposed
by the platform sets generated using `lib.systems.elaborate`. In most cases
you will want to use the new `canExecute` predicate instead which also
considers the kernel / syscall interface. It is briefly described in the
release's [highlights section](#sec-release-22.11-highlights).
`lib.systems.parse.isCompatible` still exists, but has changed semantically:
Architectures with differing endianness modes are *no longer considered compatible*.
- The `isPowerPC` predicate, found on `platform` attrsets (`hostPlatform`, `buildPlatform`, `targetPlatform`, etc) has been removed in order to reduce confusion. The predicate was was defined such that it matches only the 32-bit big-endian members of the POWER/PowerPC family, despite having a name which would imply a broader set of systems. If you were using this predicate, you can replace `foo.isPowerPC` with `(with foo; isPower && is32bit && isBigEndian)`.
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## Other Notable Changes {#sec-release-22.11-notable-changes}
- A new module was added for the Saleae Logic device family, providing the options `hardware.saleae-logic.enable` and `hardware.saleae-logic.package`.
- Matrix Synapse now requires entries in the `state_group_edges` table to be unique, in order to prevent accidentally introducing duplicate information (for example, because a database backup was restored multiple times). If your Synapse database already has duplicate rows in this table, this could fail with an error and require manual remediation.
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