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/matplotlib/default.nix

@@ -0,0 +1,127 @@
+{ lib, stdenv, fetchPypi, writeText, buildPythonPackage, isPy3k, pycairo
+, which, cycler, python-dateutil, numpy, pyparsing, sphinx, tornado, kiwisolver
+, freetype, qhull, libpng, pkg-config, mock, pytz, pygobject3, gobject-introspection
+, certifi, pillow, fonttools, setuptools-scm, setuptools-scm-git-archive, packaging
+, enableGhostscript ? true, ghostscript, gtk3
+, enableGtk3 ? false, cairo
+# darwin has its own "MacOSX" backend
+, enableTk ? !stdenv.isDarwin, tcl, tk, tkinter
+, enableQt ? false, pyqt5
+# required for headless detection
+, libX11, wayland
+, Cocoa
+}:
+
+let
+  interactive = enableTk || enableGtk3 || enableQt;
+in
+
+buildPythonPackage rec {
+  version = "3.5.2";
+  pname = "matplotlib";
+  format = "setuptools";
+
+  disabled = !isPy3k;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "18h78s5ld1i6mz00w258hy29909nfr3ddq6ry9kq18agw468bks8";
+  };
+
+  XDG_RUNTIME_DIR = "/tmp";
+
+  nativeBuildInputs = [
+    pkg-config
+    setuptools-scm
+    setuptools-scm-git-archive
+  ];
+
+  buildInputs = [
+    which
+    sphinx
+  ] ++ lib.optional enableGhostscript [
+    ghostscript
+  ] ++ lib.optional stdenv.isDarwin [
+    Cocoa
+  ];
+
+  propagatedBuildInputs = [
+    certifi
+    cycler
+    fonttools
+    freetype
+    kiwisolver
+    libpng
+    mock
+    numpy
+    packaging
+    pillow
+    pyparsing
+    python-dateutil
+    pytz
+    qhull
+    tornado
+  ] ++ lib.optionals enableGtk3 [
+    cairo
+    gobject-introspection
+    gtk3
+    pycairo
+    pygobject3
+  ] ++ lib.optionals enableTk [
+    libX11
+    tcl
+    tk
+    tkinter
+  ] ++ lib.optionals enableQt [
+    pyqt5
+  ];
+
+  passthru.config = {
+    directories = { basedirlist = "."; };
+    libs = {
+      system_freetype = true;
+      system_qhull = true;
+    } // lib.optionalAttrs stdenv.isDarwin {
+      # LTO not working in darwin stdenv, see #19312
+      enable_lto = false;
+    };
+  };
+
+  MPLSETUPCFG = writeText "mplsetup.cfg" (lib.generators.toINI {} passthru.config);
+
+  # Matplotlib tries to find Tcl/Tk by opening a Tk window and asking the
+  # corresponding interpreter object for its library paths. This fails if
+  # `$DISPLAY` is not set. The fallback option assumes that Tcl/Tk are both
+  # installed under the same path which is not true in Nix.
+  # With the following patch we just hard-code these paths into the install
+  # script.
+  postPatch =
+    let
+      tcl_tk_cache = ''"${tk}/lib", "${tcl}/lib", "${lib.strings.substring 0 3 tk.version}"'';
+    in
+    lib.optionalString enableTk ''
+      sed -i '/self.tcl_tk_cache = None/s|None|${tcl_tk_cache}|' setupext.py
+    '' + lib.optionalString (stdenv.isLinux && interactive) ''
+      # fix paths to libraries in dlopen calls (headless detection)
+      substituteInPlace src/_c_internal_utils.c \
+        --replace libX11.so.6 ${libX11}/lib/libX11.so.6 \
+        --replace libwayland-client.so.0 ${wayland}/lib/libwayland-client.so.0
+    '' +
+    # avoid matplotlib trying to download dependencies
+    ''
+      echo "[libs]
+      system_freetype=true
+      system_qhull=true" > mplsetup.cfg
+    '';
+
+  # Matplotlib needs to be built against a specific version of freetype in
+  # order for all of the tests to pass.
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Python plotting library, making publication quality plots";
+    homepage    = "https://matplotlib.org/";
+    license     = with licenses; [ psfl bsd0 ];
+    maintainers = with maintainers; [ lovek323 veprbl ];
+  };
+}