diff --git a/deploy-static-site/action.yaml b/deploy-static-site/action.yaml
index fc7883e..03ff96f 100644
--- a/deploy-static-site/action.yaml
+++ b/deploy-static-site/action.yaml
@@ -53,6 +53,14 @@ runs:
         NIXPKGS_ALLOW_UNFREE=1 nix profile install --impure nixpkgs#nomad nixpkgs#awscli2 nixpkgs#skopeo
         echo "$HOME/.nix-profile/bin" >> $GITHUB_PATH
 
+    - name: Cache installed tools
+      if: env.NIX_SIGNING_KEY != ''
+      uses: https://git.toph.so/toph/ci-actions/push-nix-cache@main
+      with:
+        store-path: ${{ env.HOME }}/.nix-profile
+        s3-endpoint: ${{ inputs.s3-endpoint }}
+        s3-bucket: ${{ inputs.s3-bucket }}
+
     - name: Build site
       shell: bash
       run: nix build ".#${{ inputs.flake-output }}" --out-link result-site