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/tor-exporter.nix

@@ -0,0 +1,39 @@
+{ lib, fetchFromGitHub, python3Packages, nixosTests }:
+
+python3Packages.buildPythonApplication rec {
+  pname = "tor-exporter";
+  version = "0.4";
+
+  # Just a single .py file to use as the application's main entry point.
+  format = "other";
+
+  src = fetchFromGitHub {
+    rev = "v${version}";
+    owner = "atx";
+    repo = "prometheus-tor_exporter";
+    sha256 = "1gzf42z0cgdqijbi9cwpjkqzkvnabaxkkfa5ac5h27r3pxx3q4n0";
+  };
+
+  propagatedBuildInputs = with python3Packages; [ prometheus-client stem retrying ];
+
+  installPhase = ''
+    mkdir -p $out/share/
+    cp prometheus-tor-exporter.py $out/share/
+  '';
+
+  fixupPhase = ''
+    makeWrapper "${python3Packages.python.interpreter}" "$out/bin/prometheus-tor-exporter" \
+          --set PYTHONPATH "$PYTHONPATH" \
+          --add-flags "$out/share/prometheus-tor-exporter.py"
+  '';
+
+  passthru.tests = { inherit (nixosTests.prometheus-exporters) tor; };
+
+  meta = with lib; {
+    description = "Prometheus exporter that exposes metrics from a Tor daemon";
+    homepage = "https://github.com/atx/prometheus-tor_exporter";
+    license = licenses.mit;
+    maintainers = with maintainers; [ delroth ];
+    platforms = platforms.unix;
+  };
+}