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/editors/jupyter/kernel.nix

@@ -0,0 +1,74 @@
+{ lib, stdenv, python3}:
+
+let
+
+  default = {
+    python3 = let
+      env = (python3.withPackages (ps: with ps; [ ipykernel ]));
+    in {
+      displayName = "Python 3";
+      argv = [
+        env.interpreter
+        "-m"
+        "ipykernel_launcher"
+        "-f"
+        "{connection_file}"
+      ];
+      language = "python";
+      logo32 = "${env.sitePackages}/ipykernel/resources/logo-32x32.png";
+      logo64 = "${env.sitePackages}/ipykernel/resources/logo-64x64.png";
+    };
+  };
+
+in
+{
+  inherit default;
+
+  # Definitions is an attribute set.
+
+  create = { definitions ?  default }: with lib; stdenv.mkDerivation {
+
+    name = "jupyter-kernels";
+
+    src = "/dev/null";
+
+    unpackCmd = "mkdir jupyter_kernels";
+
+    installPhase =  ''
+      mkdir kernels
+
+      ${concatStringsSep "\n" (mapAttrsToList (kernelName: unfilteredKernel:
+        let
+          allowedKernelKeys = ["argv" "displayName" "language" "interruptMode" "env" "metadata" "logo32" "logo64"];
+          kernel = filterAttrs (n: v: (any (x: x == n) allowedKernelKeys)) unfilteredKernel;
+          config = builtins.toJSON (
+            kernel
+            // {display_name = if (kernel.displayName != "") then kernel.displayName else kernelName;}
+            // (optionalAttrs (kernel ? interruptMode) { interrupt_mode = kernel.interruptMode; })
+          );
+          logo32 =
+            if (kernel.logo32 != null)
+            then "ln -s ${kernel.logo32} 'kernels/${kernelName}/logo-32x32.png';"
+            else "";
+          logo64 =
+            if (kernel.logo64 != null)
+            then "ln -s ${kernel.logo64} 'kernels/${kernelName}/logo-64x64.png';"
+            else "";
+        in ''
+          mkdir 'kernels/${kernelName}';
+          echo '${config}' > 'kernels/${kernelName}/kernel.json';
+          ${logo32}
+          ${logo64}
+        '') definitions)}
+
+      mkdir $out
+      cp -r kernels $out
+    '';
+
+    meta = {
+      description = "Wrapper to create jupyter notebook kernel definitions";
+      homepage = "https://jupyter.org/";
+      maintainers = with maintainers; [ aborsu ];
+    };
+  };
+}