diff --git a/.github/workflows/eowyn.yml b/.github/workflows/eowyn.yml
new file mode 100644
index 0000000..9a422b6
--- /dev/null
+++ b/.github/workflows/eowyn.yml
@@ -0,0 +1,25 @@
+name: Eowyn
+on:
+  pull_request:
+    branches: [ main ]
+  schedule:
+    - cron: "0 0 * * *"
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup Zig
+      uses: goto-bus-stop/setup-zig@v1.3.0
+      with:
+        version: master
+
+    - run: patches/eowyn.sh
diff --git a/patches/eowyn.sh b/patches/eowyn.sh
index 1ff3f75..a30a67a 100755
--- a/patches/eowyn.sh
+++ b/patches/eowyn.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 #     "I will be a shieldmaiden no longer,
 #      nor vie with the great Riders, nor