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/servers/monitoring/prometheus/node-exporter.nix

@@ -0,0 +1,50 @@
+{ lib, stdenv, buildGoModule, fetchFromGitHub, nixosTests
+  # darwin
+  , CoreFoundation, IOKit
+}:
+
+buildGoModule rec {
+  pname = "node_exporter";
+  version = "1.3.1";
+  rev = "v${version}";
+
+  src = fetchFromGitHub {
+    inherit rev;
+    owner = "prometheus";
+    repo = "node_exporter";
+    sha256 = "sha256-+0k9LBsHqNHmoOAY1UDzbbqni+ikj+c3ijfT41rCfLc=";
+  };
+
+  vendorSha256 = "sha256-nAvODyy+PfkGFAaq+3hBhQaPji5GUMU7N8xcgbGQMeI=";
+
+  # FIXME: tests fail due to read-only nix store
+  doCheck = false;
+
+  buildInputs = lib.optionals stdenv.isDarwin [ CoreFoundation IOKit ];
+  # upstream currently doesn't work with the version of the macOS SDK
+  # we're building against in nix-darwin without a patch.
+  # this patch has been submitted upstream at https://github.com/prometheus/node_exporter/pull/2327
+  # and only needs to be carried until it lands in a new release.
+  patches = lib.optionals stdenv.isDarwin [ ./node-exporter/node-exporter-darwin.patch ];
+
+  excludedPackages = [ "docs/node-mixin" ];
+
+  ldflags = [
+    "-s"
+    "-w"
+    "-X github.com/prometheus/common/version.Version=${version}"
+    "-X github.com/prometheus/common/version.Revision=${rev}"
+    "-X github.com/prometheus/common/version.Branch=unknown"
+    "-X github.com/prometheus/common/version.BuildUser=nix@nixpkgs"
+    "-X github.com/prometheus/common/version.BuildDate=unknown"
+  ];
+
+  passthru.tests = { inherit (nixosTests.prometheus-exporters) node; };
+
+  meta = with lib; {
+    description = "Prometheus exporter for machine metrics";
+    homepage = "https://github.com/prometheus/node_exporter";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ benley fpletz globin Frostman ];
+  };
+}