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/security/step-ca/default.nix

@@ -0,0 +1,58 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, buildGoModule
+, coreutils
+, pcsclite
+, PCSC
+, pkg-config
+, hsmSupport ? true
+, nixosTests
+}:
+
+buildGoModule rec {
+  pname = "step-ca";
+  version = "0.19.0";
+
+  src = fetchFromGitHub {
+    owner = "smallstep";
+    repo = "certificates";
+    rev = "v${version}";
+    sha256 = "sha256-BhPup3q2muYGWzAa/9b4vnIjBces4GhUHZ/mg4CWMRc=";
+  };
+
+  vendorSha256 = "sha256-oVaziWZGslZCVqkEXL32XvOVU54VOf41Qg+VoVWo7x0=";
+
+  ldflags = [ "-buildid=" ];
+
+  nativeBuildInputs = lib.optionals hsmSupport [ pkg-config ];
+
+  buildInputs =
+    lib.optionals (hsmSupport && stdenv.isLinux) [ pcsclite ]
+    ++ lib.optionals (hsmSupport && stdenv.isDarwin) [ PCSC ];
+
+  postPatch = ''
+    substituteInPlace systemd/step-ca.service --replace "/bin/kill" "${coreutils}/bin/kill"
+  '';
+
+  preBuild = ''
+    ${lib.optionalString (!hsmSupport) "export CGO_ENABLED=0"}
+  '';
+
+  postInstall = ''
+    install -Dm444 -t $out/lib/systemd/system systemd/step-ca.service
+  '';
+
+  # Tests start http servers which need to bind to local addresses:
+  # panic: httptest: failed to listen on a port: listen tcp6 [::1]:0: bind: operation not permitted
+  __darwinAllowLocalNetworking = true;
+
+  passthru.tests.step-ca = nixosTests.step-ca;
+
+  meta = with lib; {
+    description = "A private certificate authority (X.509 & SSH) & ACME server for secure automated certificate management, so you can use TLS everywhere & SSO for SSH";
+    homepage = "https://smallstep.com/certificates/";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ cmcdragonkai mohe2015 techknowlogick ];
+  };
+}