Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: btrfs-progs 0 -> 1
attrpath: btrfs-progs
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/pypkpac2pl8qsc2gv3fvdp64y1yjyjjf-packages.json.drv
building '/nix/store/pypkpac2pl8qsc2gv3fvdp64y1yjyjjf-packages.json.drv'...

Going to be running update for following packages:
 - btrfs-progs-6.19.1

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - btrfs-progs-6.19.1: UPDATING ...
 - btrfs-progs-6.19.1: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/bt/btrfs-progs/package.nix b/pkgs/by-name/bt/btrfs-progs/package.nix
index 80f500c9ad30..e5034da09c2e 100644
--- a/pkgs/by-name/bt/btrfs-progs/package.nix
+++ b/pkgs/by-name/bt/btrfs-progs/package.nix
@@ -21,11 +21,11 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "btrfs-progs";
-  version = "6.19.1";
+  version = "7.0";
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/people/kdave/btrfs-progs/btrfs-progs-v${finalAttrs.version}.tar.xz";
-    hash = "sha256-uyfh7FTnw8C3suWW+FOnPAej1y8hvJQEIHPCTb8EV5Y=";
+    hash = "sha256-wobWh2y81yMnoLQX5M/SgDU+wj43tUn9vNeACoMtmpk=";
   };
 
   nativeBuildInputs = [

No auto update branch exists
There might already be an open PR for this update:
- btrfs-progs: 6.19.1 -> 7.0
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/518634"