specify correct arch build action

.github/actions/archpkgbuild/action.yml

@@ -0,0 +1,21 @@
+---
+name: build-arch-package
+description: Build an Arch Linux package
+inputs:
+  PKGBUILD:
+    description: PKGBUILD path
+    required: true
+  OUTDIR:
+    description: Output directory to store the built package (relative to $HOME)
+    required: false
+    default: $HOME/arch-packages
+  BUILD_SCRIPT:
+    description: Pacman configuration file used
+    required: false
+    default: extra-x86_64-build
+branding:
+  color: blue
+  icon: archive
+runs:
+  using: node16
+  main: index.js

.github/workflows/ci.yaml

@@ -87,9 +87,9 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Set proper repository url in PKGBUILD
-        run: sed -i "s|%URL%|${{ github.server_url }}/${{ github.repository }}|" .github/workflows/PKGBUILD
+        run: sed -i "s|%URL%|${{ github.server_url }}/${{ github.repository }}|" $GITHUB_WORKSPACE/tools/distro/arch/git/PKGBUILD
       - name: Build Arch Linux package
-        uses: ./
+        uses: $GITHUB_WORKSPACE/.github/actions/archpkgbuild/action.yml
         with:
           BUILD_SCRIPT: extra-x86_64-build
           PKGBUILD: $GITHUB_WORKSPACE/tools/distro/arch/git/PKGBUILD