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/guile-modules/guile-json/default.nix

@@ -0,0 +1,39 @@
+{ lib
+, stdenv
+, fetchurl
+, guile
+, texinfo
+, pkg-config
+}:
+
+stdenv.mkDerivation rec {
+  pname = "guile-json";
+  version = "4.7.1";
+
+  src = fetchurl {
+    url = "mirror://savannah/guile-json/${pname}-${version}.tar.gz";
+    sha256 = "sha256-xTSaI4D2fIphOps698mNITJdRDAjNp5vdhs2bpaUaEM=";
+  };
+
+  postConfigure = ''
+    sed -i '/moddir\s*=/s%=.*%=''${out}/share/guile/site%' Makefile;
+    sed -i '/objdir\s*=/s%=.*%=''${out}/share/guile/ccache%' Makefile;
+    sed -i '/moddir\s*=/s%=.*%=''${out}/share/guile/site/json%' json/Makefile;
+    sed -i '/objdir\s*=/s%=.*%=''${out}/share/guile/ccache/json%' json/Makefile;
+  '';
+
+  nativeBuildInputs = [
+    pkg-config texinfo
+  ];
+  buildInputs = [
+    guile
+  ];
+
+  meta = with lib; {
+    description = "JSON Bindings for GNU Guile";
+    homepage = "https://savannah.nongnu.org/projects/guile-json";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ ethancedwards8 ];
+    platforms = platforms.all;
+  };
+}