diff --git a/.github/workflows/eval.yml b/.github/workflows/eval.yml
index 3a7509622b78..b037b29c9558 100644
--- a/.github/workflows/eval.yml
+++ b/.github/workflows/eval.yml
@@ -194,6 +194,12 @@ jobs:
             --arg diffDir ./diff \
             --out-link combined
 
+      - name: Upload the maintainer list
+        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        with:
+          name: ${{ inputs.artifact-prefix }}maintainers
+          path: combined/maintainers.json
+
       - name: Compare against the target branch
         env:
           AUTHOR_ID: ${{ github.event.pull_request.user.id }}
diff --git a/ci/eval/default.nix b/ci/eval/default.nix
index 9cc5ad6857b7..75b2eb9cba5d 100644
--- a/ci/eval/default.nix
+++ b/ci/eval/default.nix
@@ -111,6 +111,7 @@ let
           --option allow-import-from-derivation false \
           --query --available \
           --out-path --json \
+          --meta \
           --show-trace \
           --arg chunkSize "$chunkSize" \
           --arg myChunk "$myChunk" \
@@ -204,6 +205,7 @@ let
         fi
 
         cat "$chunkOutputDir"/result/* | jq -s 'add | map_values(.outputs)' > $out/${evalSystem}/paths.json
+        cat "$chunkOutputDir"/result/* | jq -s 'add | map_values(.meta)' > $out/${evalSystem}/meta.json
       '';
 
   diff = callPackage ./diff.nix { };
@@ -232,6 +234,14 @@ let
           })
         ' > $out/combined-diff.json
 
+        # Combine maintainers from all systems
+        cat ${diffDir}/*/maintainers.json | jq -s '
+          add | group_by(.package) | map({
+            key: .[0].package,
+            value: map(.maintainers) | flatten | unique
+          }) | from_entries
+        ' > $out/maintainers.json
+
         mkdir -p $out/before/stats
         for d in ${diffDir}/before/*; do
           cp -r "$d"/stats-by-chunk $out/before/stats/$(basename "$d")
diff --git a/ci/eval/diff.nix b/ci/eval/diff.nix
index 0f757ce3dd12..bb8ba8088c7f 100644
--- a/ci/eval/diff.nix
+++ b/ci/eval/diff.nix
@@ -76,6 +76,27 @@ let
   afterAttrs = getAttrs after;
   diffAttrs = diff beforeAttrs afterAttrs;
   diffJson = writeText "diff.json" (builtins.toJSON diffAttrs);
+
+  # The maintainer list is not diffed, but just taken as is, to provide a map
+  # of maintainers on the target branch. A list of GitHub IDs is sufficient for
+  # all our purposes and reduces size massively.
+  meta = lib.importJSON "${after}/${evalSystem}/meta.json";
+  maintainers = lib.pipe meta [
+    (lib.mapAttrsToList (
+      k: v: {
+        # splits off the platform suffix
+        package = lib.pipe k [
+          (lib.splitString ".")
+          lib.init
+          (lib.concatStringsSep ".")
+        ];
+        maintainers = map (m: m.githubId) v.maintainers or [ ];
+      }
+    ))
+    # Some paths don't have a platform suffix, those will appear with an empty package here.
+    (lib.filter ({ package, maintainers }: package != "" && maintainers != [ ]))
+  ];
+  maintainersJson = writeText "maintainers.json" (builtins.toJSON maintainers);
 in
 runCommand "diff" { } ''
   mkdir -p $out/${evalSystem}
@@ -86,4 +107,5 @@ runCommand "diff" { } ''
   # the source files to keep the artifacts smaller.
   find $out/before $out/after -iname '*.json' -delete
   cp ${diffJson} $out/${evalSystem}/diff.json
+  cp ${maintainersJson} $out/${evalSystem}/maintainers.json
 ''