diff --git a/.changes/fix-cache-path.md b/.changes/fix-cache-path.md
new file mode 100644
index 0000000..2cd3d2e
--- /dev/null
+++ b/.changes/fix-cache-path.md
@@ -0,0 +1,4 @@
+---
+kind: fixed
+---
+Use a normalized absolute path for the binary cache so the save step works for `uses: ./` self-invocation (github.action_path ends in `/.`, which actions/cache rejected as an invalid pattern, silently skipping the save)
diff --git a/action.yml b/action.yml
index 0623cda..82ec531 100644
--- a/action.yml
+++ b/action.yml
@@ -89,12 +89,15 @@ runs:
         h=$(find . -type f \( -name '*.go' -o -name 'go.mod' -o -name 'go.sum' \) \
           -print0 | sort -z | xargs -0 sha256sum | sha256sum | awk '{print $1}')
         echo "hash=$h" >> "$GITHUB_OUTPUT"
+        # Emit a normalized absolute path: github.action_path ends in "/." for
+        # `uses: ./`, and actions/cache rejects any path containing "/./".
+        echo "binpath=$(pwd -P)/release-tool" >> "$GITHUB_OUTPUT"
 
     - name: Restore release-tool binary
       id: cache-bin
       uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830  # v4.3.0
       with:
-        path: ${{ github.action_path }}/release-tool
+        path: ${{ steps.srchash.outputs.binpath }}
         key: release-tool-${{ runner.os }}-${{ runner.arch }}-go${{ inputs.go-version }}-${{ steps.srchash.outputs.hash }}
 
     - uses: actions/setup-go@924ae3a1cded613372ab5595356fb5720e22ba16 # v6.5.0