uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/python-modules/pdf2image/default.nix

@@ -0,0 +1,26 @@
+{ lib, buildPythonPackage, fetchPypi, pillow, poppler_utils }:
+
+buildPythonPackage rec {
+  pname = "pdf2image";
+  version = "1.16.0";
+
+  propagatedBuildInputs = [ pillow ];
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "d58ed94d978a70c73c2bb7fdf8acbaf2a7089c29ff8141be5f45433c0c4293bb";
+  };
+
+  postPatch = ''
+    # Only replace first match in file
+    sed -i '0,/poppler_path=None/s||poppler_path="${poppler_utils}/bin"|' pdf2image/pdf2image.py
+  '';
+
+  meta = with lib; {
+    description = "A python module that wraps the pdftoppm utility to convert PDF to PIL Image object";
+    homepage = "https://github.com/Belval/pdf2image";
+    license = licenses.mit;
+    maintainers = with maintainers; [ gerschtli ];
+    platforms = platforms.all;
+  };
+}