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/applications/misc/keepass-plugins/keeagent/default.nix

@@ -0,0 +1,32 @@
+{ lib, stdenv, buildEnv, fetchzip, mono }:
+
+let
+  version = "0.12.0";
+  drv = stdenv.mkDerivation {
+    pname = "keeagent";
+    inherit version;
+
+    src = fetchzip {
+      url = "https://lechnology.com/wp-content/uploads/2020/05/KeeAgent_v0.12.0.zip";
+      sha256 = "0fcfbj3yikiv3dmp69236h9r3c416amdq849kn131w1129gb68xd";
+      stripRoot = false;
+    };
+
+    meta = {
+      description = "KeePass plugin to allow other programs to access SSH keys stored in a KeePass database for authentication";
+      homepage    = "http://lechnology.com/software/keeagent";
+      platforms   = with lib.platforms; linux;
+      license     = lib.licenses.gpl2;
+      maintainers = [ ];
+    };
+
+    pluginFilename = "KeeAgent.plgx";
+
+    installPhase = ''
+      mkdir -p $out/lib/dotnet/keepass/
+      cp $pluginFilename $out/lib/dotnet/keepass/$pluginFilename
+    '';
+  };
+in
+  # Mono is required to compile plugin at runtime, after loading.
+  buildEnv { name = drv.name; paths = [ mono drv ]; }