diff --git a/.github/workflows/nix-build.yml b/.github/workflows/nix-build.yml
index 4672178..bd3fe48 100644
--- a/.github/workflows/nix-build.yml
+++ b/.github/workflows/nix-build.yml
@@ -101,17 +101,6 @@ jobs:
         env:
           AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
           AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-      # Uploaded before any build so the substituter answers from the very
-      # first config instead of only after the first push.
-      - name: Publish nix-cache-info
-        run: |
-          printf 'StoreDir: /nix/store\nWantMassQuery: 1\nPriority: 100\n' \
-            | aws s3 cp - "s3://icedos-nix-cache-fyi/nix-cache-info" --region eu-central-1
-        env:
-          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
-          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-          AWS_REGION: eu-central-1
-          AWS_DEFAULT_REGION: eu-central-1
       - name: Test cache server
         run: |
           # A missing path must answer 403/404 through CloudFront + Cloudflare.
diff --git a/build.sh b/build.sh
index 8364348..7a2ab76 100644
--- a/build.sh
+++ b/build.sh
@@ -217,14 +217,8 @@ build_and_push() {
     missing_paths=()
     printf '%s\n' "${closure_paths[@]}" | xargs -P 8 -I{} bash -c '
       h=$(basename "{}" | cut -c1-32)
-      code=000
-      for i in 1 2 3; do
-        code=$(curl -s -o /dev/null -w "%{http_code}" --head --max-time 20 "https://cache.nixos.org/$h.narinfo")
-        [ "$code" = 000 ] || break
-        sleep $((i * 2))
-      done
-      # a failed probe is not proof of absence; pushing beats permanent skip
-      [ "$code" = 200 ] || printf "%s\n" "{}"
+      code=$(curl -s -o /dev/null -w "%{http_code}" --head --max-time 20 "https://cache.nixos.org/$h.narinfo")
+      [ "$code" != 200 ] && printf "%s\n" "{}"
     ' >"$out/missing-paths" || true
     mapfile -t missing_paths < "$out/missing-paths"
     echo "$cfg: $((${#closure_paths[@]} - ${#missing_paths[@]})) paths in upstream, pushing ${#missing_paths[@]}"
diff --git a/flake.lock b/flake.lock
index 79b5748..3f10e85 100644
--- a/flake.lock
+++ b/flake.lock
@@ -3,16 +3,16 @@
     "cache-server": {
       "flake": false,
       "locked": {
-        "lastModified": 1787752985,
-        "narHash": "sha256-7JWxzkZ+u9lP2wvBQ+256cUhGLcGfFhHZXjcV3Gcs6U=",
+        "lastModified": 1788115329,
+        "narHash": "sha256-SpIoKmz7x0EDuyTm7jUbcOc5ni1ErEt7oQbHWgV4sYs=",
         "owner": "icedos",
         "repo": "cache-server",
-        "rev": "30c17556cdabb624109eef1cd9ab03b63520eadd",
+        "rev": "3a94743c003eb15a11b248c651ab77baecd74909",
         "type": "github"
       },
       "original": {
         "owner": "icedos",
-        "ref": "key",
+        "ref": "cache",
         "repo": "cache-server",
         "type": "github"
       }
@@ -25,11 +25,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1787849045,
-        "narHash": "sha256-8FuFltMbLSJ4p/IjFHwE0D9QgA/d05QnGXJQ/FdbdsA=",
+        "lastModified": 1788125528,
+        "narHash": "sha256-7VoNdIPU5zlpD/uH+BLcf+tXoqFHLQwT7o5QmLfL23Y=",
         "owner": "IceDOS",
         "repo": "core",
-        "rev": "09a566fd23b4622fce3168216c5530a04fdce157",
+        "rev": "886127d7a0878d4326100768fa3cf48b53af1a16",
         "type": "github"
       },
       "original": {
@@ -40,11 +40,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1787736819,
-        "narHash": "sha256-cV5xEJJK3BvhU8rEd4mC9UsmDi5qscv/kzGPhBRC5WA=",
+        "lastModified": 1788039129,
+        "narHash": "sha256-pa4Q0qErvCvzCaaUph7Sm37RhR4xvPrYI8Lgz6k85+A=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9fbb54b33e91ee4ca368e35a78e0613c720600b3",
+        "rev": "d2f67949798825fe853f7c5d0492b8bf016d3f88",
         "type": "github"
       },
       "original": {
diff --git a/state/tracked-inputs.json b/state/tracked-inputs.json
index c2eef8a..2f5bd5e 100644
--- a/state/tracked-inputs.json
+++ b/state/tracked-inputs.json
@@ -1,7 +1,13 @@
 {
-  "nix-cachyos-kernel": "290b62ec266d15827ab79852483e434eeba912e0",
+  "nix-cachyos-kernel": {
+    "rev": "f39e7d511ce7c2c95a12b828b72d9463f329e68b",
+    "repo": ""
+  },
   "ambiled": "8a9a9042f77129ea5aded8a98f0804a673332c1b",
   "prefixer": "b7c0a01125ad1b908363d70a51731ad7303ede5e",
-  "plasmazones": "26fc9144b08591a371b64b9d36cc74ba233bd241",
+  "plasmazones": {
+    "rev": "f2c70b4323f1726ff283404c0e484004d9967275",
+    "repo": ""
+  },
   "jovian": "9ffc5dc5af266c2e44066f22e5496274cf93a1a6"
 }