Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: capnproto 0 -> 1
attrpath: capnproto
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/rjmw11avy9hl4j8h1g2p2rx401z92mcq-packages.json.drv
building '/nix/store/rjmw11avy9hl4j8h1g2p2rx401z92mcq-packages.json.drv'...

Going to be running update for following packages:
 - capnproto-1.2.0

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - capnproto-1.2.0: UPDATING ...
 - capnproto-1.2.0: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/ca/capnproto/package.nix b/pkgs/by-name/ca/capnproto/package.nix
index c308fb66ef7b..4bc76e06519f 100644
--- a/pkgs/by-name/ca/capnproto/package.nix
+++ b/pkgs/by-name/ca/capnproto/package.nix
@@ -33,14 +33,14 @@ in
 # See: https://gerrit.lix.systems/c/lix/+/1874
 clangStdenv.mkDerivation rec {
   pname = "capnproto";
-  version = "1.2.0";
+  version = "1.3.0";
 
   # release tarballs are missing some ekam rules
   src = fetchFromGitHub {
     owner = "capnproto";
     repo = "capnproto";
     rev = "v${version}";
-    hash = "sha256-aDcn4bLZGq8915/NPPQsN5Jv8FRWd8cAspkG3078psc=";
+    hash = "sha256-fvZzNDBZr73U+xbj1LhVj1qWZyNmblKluh7lhacV+6I=";
   };
 
   patches = [

No auto update branch exists
There might already be an open PR for this update:
- capnproto: 1.2.0 -> 1.3.0
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/485054"