Try to make build reproducible for my rpi

Author: jhgarner

.github/workflows/updatecache.yml

@@ -20,6 +20,7 @@ jobs:
       with:
         name: jhgarner-projects
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-    - run: nix-build --argstr system ${{ matrix.system }}
+    - run: nix-build --argstr system ${{ matrix.system }} -o result
       env:
         NIXPKGS_ALLOW_BROKEN: 1
+    - run: cachix push jhgarner-projects result

app.nix

@@ -7,7 +7,7 @@
 mkDerivation {
   pname = "DailyReporter";
   version = "0.1.0.0";
-  src = ./.;
+  src = lib.cleanSource ./.;
   isLibrary = true;
   isExecutable = true;
   libraryHaskellDepends = [