{ pkgs, denoCache }:
pkgs.stdenv.mkDerivation {
  name = "loom";
  src = ./loom;

  buildPhase = ''
    export DENO_DIR=$TMPDIR/.deno_cache
    echo "Deno cache is ${denoCache}"
    cp -rL "${denoCache}" "$DENO_DIR"/ 2>/dev/null || true
    chmod -R u+w "$DENO_DIR" 2>/dev/null || true

    echo "DENO_DIR is $DENO_DIR"

    ${pkgs.deno}/bin/deno task build:editor
  '';

  installPhase = ''
    mkdir -p $out/bin $out/editor

    cp -r editor/dist $out/editor/dist
    cp -r mod.ts deno.json deno.lock $out
    cp -r cli $out
    # This is meant to be executed from inside a devShell with Deno set up
    cat > $out/bin/loom <<EOF
#!/bin/sh
cd $out
exec deno task run "\$@"
EOF
  chmod +x $out/bin/loom
  '';
}