Further flake fixes

flake.nix

@@ -24,20 +24,23 @@
           name = "frontend";
           src = ./.;
           buildInputs = [
-            pkgs.yarn 
-            node-modules 
+            pkgs.yarn
+            node-modules
             pkgs.nodejs
             pkgs.nodePackages.typescript
           ];
           buildPhase = ''
             # Set HOME to a writable directory
             export HOME=$TMPDIR
-            
+
             # Link the node_modules
             ln -sf ${node-modules}/libexec/kucinako/node_modules node_modules
-            
+
+            # Add node_modules/.bin to PATH
+            export PATH=$PWD/node_modules/.bin:$PATH
+
             # Build the project
-            ${pkgs.yarn}/bin/yarn build
+            yarn build
           '';
           installPhase = ''
             mkdir -p $out