Reduce files copied into build

app/Main.hs

@@ -108,7 +108,7 @@ instance MimeRender HTML BytesModel where
     H.head $ do
       H.meta ! A.charset "utf-8"
       H.title "utoy"
-      H.style $ H.toHtml $ Encoding.decodeUtf8 $(embedFile "utoy.css")
+      H.style $ H.toHtml $ Encoding.decodeUtf8 $(embedFile "static/utoy.css")
     H.body $ do
       H.table $ for_ model.codepoints $ \(bytes, eiC) -> do
         H.tr $ do

package.yaml

@@ -10,7 +10,7 @@ copyright:           "2023 Paul Brinkmeier"
 
 extra-source-files:
 - README.md
-- utoy.css
+- static/utoy.css
 
 dependencies:
 - base >= 4.7 && < 5

utoy.nix

@@ -11,7 +11,22 @@ let
       version = "0.1.0.0";
       pname = "utoy";
       license = pkgs.lib.licenses.mit;
+      src =
+        let
+          buildFiles = [
+            ./LICENSE
+            ./utoy.cabal
+            ./Setup.hs
+            ./app
+            ./src
+            ./static
+            ./test
+          ];
+        in
+          pkgs.lib.sources.cleanSourceWith {
             src = ./.;
+            filter = path: _type: pkgs.lib.any (prefix: pkgs.lib.hasPrefix (toString prefix) path) buildFiles;
+          };
 
       libraryHaskellDepends = haskellDeps haskellPackages;
     };