make directories configurable

flake.nix

@@ -36,10 +36,20 @@
             })
             { inherit pkgs; };
         in rec {
-          packages.${name} = project.rootCrate.build;
+          packages.${name} = pkgs.symlinkJoin {
+            inherit name;
+            paths = [ packages."${name}-unwrapped" ];
+            buildInputs = [ pkgs.makeWrapper ];
+            postBuild = ''
+              wrapProgram $out/bin/${name} \
+                --set STATIC_DIR ${./static}
+            '';
+          };
 
           defaultPackage = packages.${name};
 
+          packages."${name}-unwrapped" = project.rootCrate.build;
+
           devShell = pkgs.mkShell {
             nativeBuildInputs = with pkgs; [ rustc cargo cargo-audit stdenv.cc ];
             RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";