diff --git a/.github/workflows/update-nix.yml b/.github/workflows/update-nix.yml
deleted file mode 100644
index 3e088c3..0000000
--- a/.github/workflows/update-nix.yml
+++ /dev/null
@@ -1,31 +0,0 @@
-name: "Update nix"
-on:
-  repository_dispatch:
-  workflow_dispatch:
-  schedule:
-    - cron: "31 2 * * *"
-jobs:
-  update-nix-releases:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - name: Update nix releases
-        env:
-         GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          latest_nix=$(
-            gh api repos/NixOS/nix/tags --paginate --jq '.[].name' |
-            grep -E '^[0-9]+\.[0-9]+\.[0-9]+$' |
-            sort -V |
-            tail -n 1
-          )
-          if [ -z "$latest_nix" ]; then
-            echo "Failed to determine latest Nix version." >&2
-            exit 1
-          fi
-          sed -i -E "s/nix_version=[0-9.]+/nix_version=${latest_nix}/" ./install-nix.sh
-      - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v7
-        with:
-          title: Update nix versions
-          labels: dependencies
diff --git a/install-nix.sh b/install-nix.sh
index 7198377..879e214 100755
--- a/install-nix.sh
+++ b/install-nix.sh
@@ -94,8 +94,7 @@ echo "installer options: ${installer_options[*]}"
 
 # There is --retry-on-errors, but only newer curl versions support that
 curl_retries=5
-nix_version=2.29.0
-while ! curl -sS -o "$workdir/install" -v --fail -L "${INPUT_INSTALL_URL:-https://releases.nixos.org/nix/nix-${nix_version}/install}"
+while ! curl -sS -o "$workdir/install" -v --fail -L "${INPUT_INSTALL_URL:-https://releases.nixos.org/nix/nix-2.28.3/install}"
 do
   sleep 1
   ((curl_retries--))