changelog-d 0 -> 1
attrpath: changelog-d
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] these 2 derivations will be built:
  /nix/store/m7scw5rhpq5fas7654vv3lsn7szybl9i-update-changelog-d.drv
  /nix/store/4klwqz21k6x1m5z1idghxp30952c6ap6-packages.json.drv
building '/nix/store/m7scw5rhpq5fas7654vv3lsn7szybl9i-update-changelog-d.drv'...
building '/nix/store/4klwqz21k6x1m5z1idghxp30952c6ap6-packages.json.drv'...

Going to be running update for following packages:
 - changelog-d-0.1-git-2816ddb

Press Enter key to continue...
Running update for:
 - changelog-d-0.1-git-2816ddb: UPDATING ...
 - changelog-d-0.1-git-2816ddb: DONE.

Packages updated!

Diff after rewrites:
diff --git a/pkgs/development/misc/haskell/changelog-d/default.nix b/pkgs/development/misc/haskell/changelog-d/default.nix
index 7abc707540ce..359b8642923e 100644
--- a/pkgs/development/misc/haskell/changelog-d/default.nix
+++ b/pkgs/development/misc/haskell/changelog-d/default.nix
@@ -1,23 +1,23 @@
-{ mkDerivation, base, bytestring, cabal-install-parsers
+{ mkDerivation, aeson, base, bytestring, cabal-install-parsers
 , Cabal-syntax, containers, directory, fetchgit, filepath
-, generic-lens-lite, lib, mtl, optparse-applicative, parsec, pretty
-, regex-applicative
+, frontmatter, generic-lens-lite, lib, mtl, optparse-applicative
+, parsec, pretty, regex-applicative, text
 }:
 mkDerivation {
   pname = "changelog-d";
   version = "0.1";
   src = fetchgit {
     url = "https://codeberg.org/fgaz/changelog-d";
-    sha256 = "0r0gr3bl88am9jivic3i8lfi9l5v1dj7xx4fvw6hhy3wdx7z50z7";
-    rev = "2816ddb78cec8b7fa4462c25028437ebfe3ad314";
+    sha256 = "01v104xr9fyz67mx01730h0yngml3pz5lrrkagswr3n8hm6r4nlq";
+    rev = "8bc723b0031195917f6b7c7b6145448d2e0a99fc";
     fetchSubmodules = true;
   };
   isLibrary = false;
   isExecutable = true;
   libraryHaskellDepends = [
-    base bytestring cabal-install-parsers Cabal-syntax containers
-    directory filepath generic-lens-lite mtl parsec pretty
-    regex-applicative
+    aeson base bytestring cabal-install-parsers Cabal-syntax containers
+    directory filepath frontmatter generic-lens-lite mtl parsec pretty
+    regex-applicative text
   ];
   executableHaskellDepends = [
     base bytestring Cabal-syntax directory filepath

No auto update branch exists
Old version 0.1-git-2816ddb" not present in master derivation file with contents: { mkDerivation, base, bytestring, cabal-install-parsers
, Cabal-syntax, containers, directory, fetchgit, filepath
, generic-lens-lite, lib, mtl, optparse-applicative, parsec, pretty
, regex-applicative
}:
mkDerivation {
  pname = "changelog-d";
  version = "0.1";
  src = fetchgit {
    url = "https://codeberg.org/fgaz/changelog-d";
    sha256 = "0r0gr3bl88am9jivic3i8lfi9l5v1dj7xx4fvw6hhy3wdx7z50z7";
    rev = "2816ddb78cec8b7fa4462c25028437ebfe3ad314";
    fetchSubmodules = true;
  };
  isLibrary = false;
  isExecutable = true;
  libraryHaskellDepends = [
    base bytestring cabal-install-parsers Cabal-syntax containers
    directory filepath generic-lens-lite mtl parsec pretty
    regex-applicative
  ];
  executableHaskellDepends = [
    base bytestring Cabal-syntax directory filepath
    optparse-applicative
  ];
  doHaddock = false;
  description = "Concatenate changelog entries into a single one";
  license = lib.licenses.gpl3Plus;
  mainProgram = "changelog-d";
}