feat(Nix-flakes): Add pgBackRest flake (#1859)

Co-authored-by: samrose <[email protected]>

Author: jchancojr

flake.lock

@@ -19,6 +19,7 @@
     git-hooks.url = "github:cachix/git-hooks.nix";
     git-hooks.inputs.nixpkgs.follows = "nixpkgs";
     nixpkgs-go124.url = "github:Nixos/nixpkgs/d2ac4dfa61fba987a84a0a81555da57ae0b9a2b0";
+    nixpkgs-pgbackrest.url = "github:nixos/nixpkgs/nixos-unstable-small";
   };
 
   outputs =

flake.nix

@@ -40,6 +40,7 @@
           migrate-tool = pkgs.callPackage ./migrate-tool.nix { psql_15 = self'.packages."psql_15/bin"; };
           overlayfs-on-package = pkgs.callPackage ./overlayfs-on-package.nix { };
           packer = pkgs.callPackage ./packer.nix { inherit inputs; };
+          pg-backrest = inputs.nixpkgs-pgbackrest.legacyPackages.${pkgs.system}.pgbackrest;
           pg-restore = pkgs.callPackage ./pg-restore.nix { psql_15 = self'.packages."psql_15/bin"; };
           pg_prove = pkgs.perlPackages.TAPParserSourceHandlerpgTAP;
           pg_regress = makePgRegress activeVersion;