diff --git a/doc/manual/rl-next/nix-env-json-drv-path.md b/doc/manual/rl-next/nix-env-json-drv-path.md
index fbe2b67d8..734cefd1b 100644
--- a/doc/manual/rl-next/nix-env-json-drv-path.md
+++ b/doc/manual/rl-next/nix-env-json-drv-path.md
@@ -1,9 +1,6 @@
+---
 synopsis: Fix `nix-env --query --drv-path --json`
-prs: #9257
-description: {
+prs: 9257
+---
 
 Fixed a bug where `nix-env --query` ignored `--drv-path` when `--json` was set.
-
-}
-
-
diff --git a/doc/manual/rl-next/source-positions-in-errors.md b/doc/manual/rl-next/source-positions-in-errors.md
index 15df884ea..5b210289d 100644
--- a/doc/manual/rl-next/source-positions-in-errors.md
+++ b/doc/manual/rl-next/source-positions-in-errors.md
@@ -1,7 +1,8 @@
+---
 synopsis: Source locations are printed more consistently in errors
-issues: #561
-prs: #9555
-description: {
+issues: 561
+prs: 9555
+---
 
 Source location information is now included in error messages more
 consistently. Given this code:
@@ -39,5 +40,3 @@ error:
 
        error: value is a set while a string was expected
 ```
-
-}
diff --git a/doc/manual/src/contributing/hacking.md b/doc/manual/src/contributing/hacking.md
index 6bea6f727..a3cf05327 100644
--- a/doc/manual/src/contributing/hacking.md
+++ b/doc/manual/src/contributing/hacking.md
@@ -322,17 +322,16 @@ User-visible changes should come with a release note.
 Here's what a complete entry looks like. The file name is not incorporated in the document.
 
 ```
+---
 synopsis: Basically a title
-issues: #1234
-prs: #1238
-description: {
+issues: 1234
+prs: 1238
+---
 
 Here's one or more paragraphs that describe the change.
 
 - It's markdown
 - Add references to the manual using @docroot@
-
-}
 ```
 
 Significant changes should add the following header, which moves them to the top.
diff --git a/flake.nix b/flake.nix
index 4e8b8ddb1..5d5d00e5d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -178,7 +178,7 @@
           "--enable-internal-api-docs"
         ];
 
-        changelog-d = pkgs.buildPackages.changelog-d;
+        changelog-d = pkgs.buildPackages.callPackage ./misc/changelog-d.nix { };
 
         nativeBuildDeps =
           [
@@ -711,6 +711,11 @@
         perlBindings = self.hydraJobs.perlBindings.${system};
         installTests = self.hydraJobs.installTests.${system};
         nixpkgsLibTests = self.hydraJobs.tests.nixpkgsLibTests.${system};
+        rl-next =
+          let pkgs = nixpkgsFor.${system}.native;
+          in pkgs.buildPackages.runCommand "test-rl-next-release-notes" { } ''
+          LANG=C.UTF-8 ${(commonDeps { inherit pkgs; }).changelog-d}/bin/changelog-d ${./doc/manual/rl-next} >$out
+        '';
       } // (lib.optionalAttrs (builtins.elem system linux64BitSystems)) {
         dockerImage = self.hydraJobs.dockerImage.${system};
       });
diff --git a/misc/changelog-d.cabal.nix b/misc/changelog-d.cabal.nix
new file mode 100644
index 000000000..76f9353cd
--- /dev/null
+++ b/misc/changelog-d.cabal.nix
@@ -0,0 +1,31 @@
+{ mkDerivation, aeson, base, bytestring, cabal-install-parsers
+, Cabal-syntax, containers, directory, filepath, frontmatter
+, generic-lens-lite, lib, mtl, optparse-applicative, parsec, pretty
+, regex-applicative, text, pkgs
+}:
+let rev = "f30f6969e9cd8b56242309639d58acea21c99d06";
+in
+mkDerivation {
+  pname = "changelog-d";
+  version = "0.1";
+  src = pkgs.fetchurl {
+    name = "changelog-d-${rev}.tar.gz";
+    url = "https://codeberg.org/roberth/changelog-d/archive/${rev}.tar.gz";
+    hash = "sha256-8a2+i5u7YoszAgd5OIEW0eYUcP8yfhtoOIhLJkylYJ4=";
+  } // { inherit rev; };
+  isLibrary = false;
+  isExecutable = true;
+  libraryHaskellDepends = [
+    aeson base bytestring cabal-install-parsers Cabal-syntax containers
+    directory filepath frontmatter generic-lens-lite mtl parsec pretty
+    regex-applicative text
+  ];
+  executableHaskellDepends = [
+    base bytestring Cabal-syntax directory filepath
+    optparse-applicative
+  ];
+  doHaddock = false;
+  description = "Concatenate changelog entries into a single one";
+  license = lib.licenses.gpl3Plus;
+  mainProgram = "changelog-d";
+}
diff --git a/misc/changelog-d.nix b/misc/changelog-d.nix
new file mode 100644
index 000000000..1b20f4596
--- /dev/null
+++ b/misc/changelog-d.nix
@@ -0,0 +1,31 @@
+# Taken temporarily from <nixpkgs/pkgs/by-name/ch/changelog-d/package.nix>
+{
+  callPackage,
+  lib,
+  haskell,
+  haskellPackages,
+}:
+
+let
+  hsPkg = haskellPackages.callPackage ./changelog-d.cabal.nix { };
+
+  addCompletions = haskellPackages.generateOptparseApplicativeCompletions ["changelog-d"];
+
+  haskellModifications =
+    lib.flip lib.pipe [
+      addCompletions
+      haskell.lib.justStaticExecutables
+    ];
+
+  mkDerivationOverrides = finalAttrs: oldAttrs: {
+
+    version = oldAttrs.version + "-git-${lib.strings.substring 0 7 oldAttrs.src.rev}";
+
+    meta = oldAttrs.meta // {
+      homepage = "https://codeberg.org/roberth/changelog-d";
+      maintainers = [ lib.maintainers.roberth ];
+    };
+
+  };
+in
+  (haskellModifications hsPkg).overrideAttrs mkDerivationOverrides