Only build on srcpkgs changed

.github/workflows/build.yaml

@@ -1,9 +1,13 @@
 name: build
 
 on:
+  # TODO: Enable once we have conditional build logic built
+  # pull_request:
+  #   paths:
+  #     - 'srcpkgs/**'
   push:
-    branches:
-      - main
+    paths:
+      - 'srcpkgs/**'
 
 jobs:
   changedpkgs:
@@ -13,6 +17,9 @@ jobs:
     steps:
       - id: matrix
         run: |
+          # TODO: enable logic
+          # maybe easiest with void-packages/common/travis/changed_templates.sh
+          # (put into /tmp/templates)
           echo "pkg=[\"dotter-bin\",\"filtile-bin\",\"git-bug-git\",\"ly-git\"]" >> $GITHUB_OUTPUT
       - run: |
           echo "${{ steps.matrix.outputs.pkg }}"