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/django_compressor/default.nix

@@ -0,0 +1,29 @@
+{ lib, buildPythonPackage, fetchPypi,
+  rcssmin, rjsmin, django-appconf }:
+
+buildPythonPackage rec {
+    pname = "django_compressor";
+    version = "3.1";
+
+    src = fetchPypi {
+      inherit pname version;
+      sha256 = "c4a87bf65f9a534cfaf1c321a000a229c24e50c6d62ba6ab089482db42e819d9";
+    };
+    postPatch = ''
+      substituteInPlace setup.py \
+        --replace 'rcssmin == 1.0.6' 'rcssmin' \
+        --replace 'rjsmin == 1.1.0' 'rjsmin'
+    '';
+
+    # requires django-sekizai, which we don't have packaged yet
+    doCheck = false;
+
+    propagatedBuildInputs = [ rcssmin rjsmin django-appconf ];
+
+    meta = with lib; {
+      description = "Compresses linked and inline JavaScript or CSS into single cached files";
+      homepage = "https://django-compressor.readthedocs.org/en/latest/";
+      license = licenses.mit;
+      maintainers = with maintainers; [ desiderius ];
+    };
+}