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/tools/networking/dd-agent/datadog-agent.nix

@@ -0,0 +1,82 @@
+{ lib, buildGoModule, makeWrapper, fetchFromGitHub, pythonPackages, pkg-config, systemd, hostname, extraTags ? [] }:
+
+let
+  # keep this in sync with github.com/DataDog/agent-payload dependency
+  payloadVersion = "4.78.0";
+  python = pythonPackages.python;
+  owner   = "DataDog";
+  repo    = "datadog-agent";
+  goPackagePath = "github.com/${owner}/${repo}";
+
+in buildGoModule rec {
+  pname = "datadog-agent";
+  version = "7.36.0";
+
+  src = fetchFromGitHub {
+    inherit owner repo;
+    rev = version;
+    sha256 = "sha256-pkbgYE58T9QzV7nCzvfBoTt6Ue8cCMUBSuCBeDtdkzo=";
+  };
+
+  vendorSha256 = "sha256-SxdSoZtRAdl3evCpb+3BHWf/uPYJJKgw0CL9scwNfGA=";
+
+  subPackages = [
+    "cmd/agent"
+    "cmd/cluster-agent"
+    "cmd/dogstatsd"
+    "cmd/py-launcher"
+    "cmd/trace-agent"
+  ];
+
+
+  nativeBuildInputs = [ pkg-config makeWrapper ];
+  buildInputs = [ systemd ];
+  PKG_CONFIG_PATH = "${python}/lib/pkgconfig";
+
+  preBuild = let
+    ldFlags = lib.concatStringsSep " " [
+      "-X ${goPackagePath}/pkg/version.Commit=${src.rev}"
+      "-X ${goPackagePath}/pkg/version.AgentVersion=${version}"
+      "-X ${goPackagePath}/pkg/serializer.AgentPayloadVersion=${payloadVersion}"
+      "-X ${goPackagePath}/pkg/collector/py.pythonHome=${python}"
+      "-r ${python}/lib"
+    ];
+  in ''
+    buildFlagsArray=( "-tags" "ec2 systemd cpython process log secrets ${lib.concatStringsSep " " extraTags}" "-ldflags" "${ldFlags}")
+    # Keep directories to generate in sync with tasks/go.py
+    go generate ./pkg/status ./cmd/agent/gui
+  '';
+
+  # DataDog use paths relative to the agent binary, so fix these.
+  postPatch = ''
+    sed -e "s|PyChecksPath =.*|PyChecksPath = \"$out/${python.sitePackages}\"|" \
+        -e "s|distPath =.*|distPath = \"$out/share/datadog-agent\"|" \
+        -i cmd/agent/common/common_nix.go
+    sed -e "s|/bin/hostname|${lib.getBin hostname}/bin/hostname|" \
+        -i pkg/util/hostname_nix.go
+  '';
+
+  # Install the config files and python modules from the "dist" dir
+  # into standard paths.
+  postInstall = ''
+    mkdir -p $out/${python.sitePackages} $out/share/datadog-agent
+    cp -R $src/cmd/agent/dist/conf.d $out/share/datadog-agent
+    cp -R $src/cmd/agent/dist/{checks,utils,config.py} $out/${python.sitePackages}
+
+    cp -R $src/pkg/status/templates $out/share/datadog-agent
+
+    wrapProgram "$out/bin/agent" \
+      --set PYTHONPATH "$out/${python.sitePackages}" \
+      --prefix LD_LIBRARY_PATH : ${lib.getLib systemd}/lib
+  '';
+
+  meta = with lib; {
+    description = ''
+      Event collector for the DataDog analysis service
+      -- v6 new golang implementation.
+    '';
+    homepage    = "https://www.datadoghq.com";
+    license     = licenses.bsd3;
+    maintainers = with maintainers; [ thoughtpolice domenkozar rvl ];
+  };
+}