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/compilers/tvm/default.nix

@@ -0,0 +1,30 @@
+{ lib, stdenv, fetchFromGitHub, cmake }:
+
+stdenv.mkDerivation rec {
+  pname = "tvm";
+  version = "0.8.0";
+
+  src = fetchFromGitHub {
+    owner = "apache";
+    repo = "incubator-tvm";
+    rev = "v${version}";
+    fetchSubmodules = true;
+    sha256 = "sha256-fv2hhPGbr/AbwuN8rAF9PI/QTTqxNgwjYl9arg5GjKY=";
+  };
+
+  nativeBuildInputs = [ cmake ];
+  # TVM CMake build uses some sources in the project's ./src/target/opt/
+  # directory which errneously gets mangled by the eager `fixCmakeFiles`
+  # function in Nix's CMake setup-hook.sh to ./src/target/var/empty/,
+  # which then breaks the build. Toggling this flag instructs Nix to
+  # not mangle the legitimate use of the opt/ folder.
+  dontFixCmake = true;
+
+  meta = with lib; {
+    homepage = "https://tvm.apache.org/";
+    description = "An End to End Deep Learning Compiler Stack for CPUs, GPUs and accelerators";
+    license = licenses.asl20;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ adelbertc ];
+  };
+}