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/pyocr/default.nix

@@ -0,0 +1,50 @@
+{ lib
+, fetchFromGitLab
+, buildPythonPackage
+, pillow
+, setuptools-scm
+, setuptools-scm-git-archive
+, tesseract
+, cuneiform
+, isPy3k
+, substituteAll
+, pytestCheckHook
+}:
+
+buildPythonPackage rec {
+  pname = "pyocr";
+  version = "0.7.2";
+  disabled = !isPy3k;
+
+  # Don't fetch from PYPI because it doesn't contain tests.
+  src = fetchFromGitLab {
+    domain = "gitlab.gnome.org";
+    group = "World";
+    owner = "OpenPaperwork";
+    repo = "pyocr";
+    rev = version;
+    sha256 = "09ab86bmizpv94w3mdvdqkjyyvk1vafw3jqhkiw5xx7p180xn3il";
+  };
+
+  patches = [
+    (substituteAll {
+      src = ./paths.patch;
+      inherit cuneiform tesseract;
+    })
+  ];
+
+  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+
+  buildInputs = [ setuptools-scm setuptools-scm-git-archive ];
+
+  propagatedBuildInputs = [ pillow ];
+
+  checkInputs = [ pytestCheckHook ];
+
+  meta = with lib; {
+    inherit (src.meta) homepage;
+    description = "A Python wrapper for Tesseract and Cuneiform";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ ];
+  };
+}