bcc 0 -> 1
attrpath: bcc
Checking auto update branch...
[version] 
[version] skipping because derivation has updateScript
[rustCrateVersion] 
[rustCrateVersion] No cargoSha256 or cargoHash found
[golangModuleVersion] 
[golangModuleVersion] Not a buildGoModule package with vendorSha256 or vendorHash
[npmDepsVersion] 
[npmDepsVersion] No npmDepsHash
[updateScript] 
[updateScript] Success
[updateScript] this derivation will be built:
  /nix/store/q32k1xy9fpirvp742n49hlb0m24mnv67-packages.json.drv
building '/nix/store/q32k1xy9fpirvp742n49hlb0m24mnv67-packages.json.drv'...

Going to be running update for following packages:
 - bcc-0.29.1

Press Enter key to continue...
Running update for:
 - bcc-0.29.1: UPDATING ...
 - bcc-0.29.1: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/os-specific/linux/bcc/default.nix b/pkgs/os-specific/linux/bcc/default.nix
index a0b91f6d778b..809824bf59ba 100644
--- a/pkgs/os-specific/linux/bcc/default.nix
+++ b/pkgs/os-specific/linux/bcc/default.nix
@@ -20,15 +20,15 @@
 
 python3.pkgs.buildPythonApplication rec {
   pname = "bcc";
-  version = "0.29.1";
+  version = "0.30.0";
 
   disabled = !stdenv.isLinux;
 
   src = fetchFromGitHub {
     owner = "iovisor";
     repo = "bcc";
-    rev = "v${version}";
-    hash = "sha256-+HYCweAI5axx0ZNFd/jLRXkUinRLDmKWMpLTk7FrEe0=";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-ngGLGfLv2prnjhgaRPf8ea3oyy4129zGodR0Yz1QtCw=";
   };
   format = "other";
 

No auto update branch exists
There might already be an open PR for this update:
- bcc: 0.29.1 -> 0.30.0
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/299475"