Running nixpkgs-update (https://nix-community.org/update-bot/) with UPDATE_INFO: cddlc 0 -> 1
attrpath: cddlc
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] these 3 derivations will be built:
  /nix/store/cggqgqiyrmm69nbi5cv8zzgp11f5bxsw-bundix-2.5.2.drv
  /nix/store/yq0xqals5kg53nxqwhk97j9c95kvww6s-bundler-update-script.drv
  /nix/store/2kv3yppc5gr28s1hx27lidvpnaiprwyk-packages.json.drv
this path will be fetched (15.5 KiB download, 57.3 KiB unpacked):
  /nix/store/zgb51c212nphjca1vjsgxyi0wkqvxdzg-source
copying path '/nix/store/zgb51c212nphjca1vjsgxyi0wkqvxdzg-source' from 'https://cache.nixos.org'...
building '/nix/store/cggqgqiyrmm69nbi5cv8zzgp11f5bxsw-bundix-2.5.2.drv'...
Running phase: unpackPhase
unpacking source archive /nix/store/zgb51c212nphjca1vjsgxyi0wkqvxdzg-source
source root is source
Running phase: patchPhase
Running phase: updateAutotoolsGnuConfigScriptsPhase
Running phase: configurePhase
no configure script, doing nothing
Running phase: buildPhase
found the following gemspecs:
./bundix.gemspec
WARNING:  description and summary are identical
WARNING:  open-ended dependency on bundler (>= 1.11) is not recommended
  if bundler is semantically versioned, use:
    add_runtime_dependency "bundler", "~> 1.11"
WARNING:  make sure you specify the oldest ruby version constraint (like ">= 3.0") that you want your gem to support by setting the `required_ruby_version` gemspec attribute
WARNING:  See https://guides.rubygems.org/specification-reference/ for help
  Successfully built RubyGem
  Name: bundix
  Version: 2.5.0
  File: bundix-2.5.0.gem
gem package built: bundix-2.5.0.gem
Running phase: installPhase
buildFlags: 
WARNING:  You build with buildroot.
  Build root: /
  Bin dir: /nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2/lib/ruby/gems/3.4.0/bin
  Gem home: /nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2/lib/ruby/gems/3.4.0
  Plugins dir: /nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2/lib/ruby/gems/3.4.0/plugins
Successfully installed bundix-2.5.0
1 gem installed
/nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2/lib/ruby/gems/3.4.0 /build/source
removed 'cache/bundix-2.5.0.gem'
removed directory 'cache'
/build/source
patching script interpreter paths in /nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2/lib/ruby/gems/3.4.0/bin
Running phase: fixupPhase
shrinking RPATHs of ELF executables and libraries in /nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2
checking for references to /build/ in /nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2...
patching script interpreter paths in /nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2
/nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2/lib/ruby/gems/3.4.0/gems/bundix-2.5.0/bin/bundix: interpreter directive changed from "#!/usr/bin/env ruby" to "/nix/store/lkrkc1fxj9yr3ghsxp7nq30c2hxn9z0k-ruby-3.4.9/bin/ruby"
stripping (with command strip and flags -S -p) in  /nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2/lib /nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2/bin
making symlink relative: /nix/store/cw4br6xqbij1wrq7y87hssjwf37bp3ms-bundix-2.5.2/nix-support/gem-meta/spec
building '/nix/store/yq0xqals5kg53nxqwhk97j9c95kvww6s-bundler-update-script.drv'...
building '/nix/store/2kv3yppc5gr28s1hx27lidvpnaiprwyk-packages.json.drv'...

Going to be running update for following packages:
 - cddlc-0.4.2

Press Enter key to continue...
Running update for:
Enqueuing group of 1 packages
 - cddlc-0.4.2: UPDATING ...
 - cddlc-0.4.2: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/by-name/cd/cddlc/Gemfile.lock b/pkgs/by-name/cd/cddlc/Gemfile.lock
index c3555056711f..5cf3a24e669a 100644
--- a/pkgs/by-name/cd/cddlc/Gemfile.lock
+++ b/pkgs/by-name/cd/cddlc/Gemfile.lock
@@ -1,12 +1,12 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    cddlc (0.4.2)
+    cddlc (0.4.5)
       neatjson (~> 0.10)
       treetop (~> 1)
     neatjson (0.10.5)
     polyglot (0.3.5)
-    treetop (1.6.14)
+    treetop (1.6.18)
       polyglot (~> 0.3)
 
 PLATFORMS
@@ -16,4 +16,4 @@ DEPENDENCIES
   cddlc
 
 BUNDLED WITH
-   2.6.9
+   2.7.2
diff --git a/pkgs/by-name/cd/cddlc/gemset.nix b/pkgs/by-name/cd/cddlc/gemset.nix
index 997b4c7cabcf..8e8d4e6ca1d8 100644
--- a/pkgs/by-name/cd/cddlc/gemset.nix
+++ b/pkgs/by-name/cd/cddlc/gemset.nix
@@ -8,10 +8,10 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1s3fbgd5yqgji162zsmlwnva1v1r3zc1qiyv6im7karv5f08r8m3";
+      sha256 = "15r34qhf9qrk0qff754vkmvw77dhxx4d5ijf149mhdfv7svwbfvr";
       type = "gem";
     };
-    version = "0.4.2";
+    version = "0.4.5";
   };
   neatjson = {
     groups = [ "default" ];
@@ -39,9 +39,9 @@
     platforms = [ ];
     source = {
       remotes = [ "https://rubygems.org" ];
-      sha256 = "1m5fqy7vq6y7bgxmw7jmk7y6pla83m16p7lb41lbqgg53j8x2cds";
+      sha256 = "1nl3q5ai7ikaa5sjdbspfa4njbrdvf7898zkplmalln6y4r3y153";
       type = "gem";
     };
-    version = "1.6.14";
+    version = "1.6.18";
   };
 }

No auto update branch exists
Old version 0.4.2" not present in master derivation file with contents: {
  lib,
  bundlerApp,
  bundlerUpdateScript,
}:

bundlerApp {
  pname = "cddlc";

  gemdir = ./.;

  exes = [ "cddlc" ];

  passthru.updateScript = bundlerUpdateScript "cddlc";

  meta = {
    description = "CDDL conversion utilities";
    homepage = "https://github.com/cabo/cddlc";
    license = lib.licenses.mit;
    platforms = lib.platforms.unix;
    mainProgram = "cddlc";
  };
}