rr-unstable: 2020-10-04 -> 2021-07-06
rr-unstable: 2020-10-04 -> 2021-07-06

It seems like the original reason for the rr-unstable package has gone
stale, and there has been a proper release (5.4.0) since it was made.
However, it has now been over 8 months since a release again, so I
figured I would repurpose rr-unstable.

I personally need the following unreleased commit to be able to use rr
at all on an AMD Ryzen 5900X CPU:

https://github.com/rr-debugger/rr/pull/2762/commits/854b51effa25c7be3d6687ac0d6ef8afe9b3e3bb

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs